<html xmlns="http://www.w3.org/1999/xhtml"><head><meta charset="utf-8"><meta name="generator" content="pdf2htmlEX"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><link rel="stylesheet" href="https://csdnimg.cn/release/download_crawler_static/css/base.min.css"><link rel="stylesheet" href="https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css"><link rel="stylesheet" href="https://csdnimg.cn/release/download_crawler_static/10022184/raw.css"><script src="https://csdnimg.cn/release/download_crawler_static/js/compatibility.min.js"></script><script src="https://csdnimg.cn/release/download_crawler_static/js/pdf2htmlEX.min.js"></script><script>try{pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({});}catch(e){}</script><title></title></head><body><div id="sidebar" style="display: none"><div id="outline"></div></div><div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://csdnimg.cn/release/download_crawler_static/10022184/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">目录<span class="ff2"> </span></div><div class="t m0 x2 h3 y2 ff3 fs1 fc1 sc0 ls1 ws1">1.<span class="_"> </span>Java<span class="_ _0"> </span><span class="ff1 ls0 ws0">基础部分<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">...................................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">10</span></span></span></span></span></div><div class="t m0 x3 h3 y3 ff3 fs1 fc1 sc0 ls0 ws0">1<span class="ff1">、一个</span><span class="ls1 ws2">".java"</span><span class="ff1">源文件中<span class="_ _2"></span>是否可以包括多个类（<span class="_ _2"></span>不是内部类<span class="_ _2"></span>）？有什么限制<span class="_ _2"></span>？<span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">........<span class="ls0 ws0"> <span class="ls2 ws3">10</span><span class="fs2"> </span></span></span></span></span></div><div class="t m0 x3 h3 y4 ff3 fs1 fc1 sc0 ls0 ws0">2<span class="ff1">、</span><span class="ls3 ws4">Java<span class="_"> </span></span><span class="ff1">有没有<span class="_ _0"> </span></span><span class="ls1 ws2">goto?</span><span class="ff4"> <span class="ls1 ws2">......................................................................................................</span> <span class="_ _2"></span><span class="ls2 ws3">10<span class="fs2 ls0 ws0"> </span></span></span></div><div class="t m0 x3 h3 y5 ff3 fs1 fc1 sc0 ls0 ws0">3<span class="ff1">、说说</span>&<span class="ff1">和</span><span class="ls4 ws5">&&</span><span class="ff1">的区别。<span class="_ _2"></span><span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">...................................................................................................<span class="ls0 ws0"> <span class="_ _2"></span><span class="ls2 ws3">10<span class="fs2 ls0 ws0"> </span></span></span></span></span></span></div><div class="t m0 x3 h3 y6 ff3 fs1 fc1 sc0 ls0 ws0">4<span class="ff1">、在<span class="_ _0"> </span></span><span class="ls4 ws5">JAVA<span class="_ _0"> </span></span><span class="ff1">中如何跳出当前的多<span class="_ _2"></span>重嵌套循环？<span class="_ _2"></span><span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">...........................................................<span class="ls0 ws0"> <span class="ls2 ws3">11</span><span class="fs2"> </span></span></span></span></span></div><div class="t m0 x3 h3 y7 ff3 fs1 fc1 sc0 ls0 ws0">5<span class="ff1">、</span>switch<span class="_ _0"> </span><span class="ff1">语句能否作<span class="_ _2"></span>用在<span class="_ _0"> </span><span class="ff3 ls3 ws4">byte<span class="_"> </span></span>上，能否作用<span class="_ _2"></span>在<span class="_ _0"> </span><span class="ff3 ls1 ws2">long<span class="_"> </span></span>上<span class="_ _2"></span>，能否作用在<span class="_ _0"> </span><span class="ff3 ls5 ws6">Str<span class="_ _4"></span>ing<span class="_"> </span></span>上<span class="ff3">?<span class="ff4"> <span class="_ _2"></span>. <span class="_ _2"></span><span class="ls2 ws3">11<span class="fs2 ls0 ws0"> </span></span></span></span></span></div><div class="t m0 x3 h3 y8 ff3 fs1 fc1 sc0 ls0 ws0">6<span class="ff1">、</span><span class="ls1 ws1">short s1 = 1; s1<span class="_ _2"></span> = s1 + 1;<span class="ff1 ls0 ws0">有什<span class="_ _2"></span>么错<span class="ff3 ls1 ws1">? short s1 = 1;<span class="_ _2"></span> s1 += 1;<span class="ff1 ls0 ws0">有什么错<span class="ff3">?<span class="_ _2"></span><span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">................<span class="ls0 ws0"> <span class="ls2 ws3">12</span><span class="fs2"> </span></span></span></span></span></span></span></span></span></div><div class="t m0 x3 h3 y9 ff3 fs1 fc1 sc0 ls0 ws0">7<span class="ff1">、</span><span class="ls1 ws2">char<span class="_"> </span></span><span class="ff1">型<span class="_ _2"></span>变量中能不能<span class="_ _2"></span>存贮一个中文汉字<span class="ff3">?</span><span class="ls3 ws4">为什么</span><span class="ff3">?<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">..................................................<span class="ls0 ws0"> <span class="ls2 ws3">12</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m0 x3 h3 ya ff3 fs1 fc1 sc0 ls0 ws0">8<span class="ff1">、用最有效率的<span class="_ _2"></span>方法算出<span class="_ _0"> </span><span class="ff3">2<span class="_ _0"> </span></span>乘以<span class="_ _0"> </span><span class="ff3">8<span class="_ _0"> </span></span>等于几<span class="ff3">?<span class="_ _2"></span><span class="ff4"> <span class="_ _2"></span><span class="ls1 ws2">................................................................<span class="ls0 ws0"> <span class="_ _2"></span><span class="ls2 ws3">12<span class="fs2 ls0 ws0"> </span></span></span></span></span></span></span></div><div class="t m0 x3 h3 yb ff3 fs1 fc1 sc0 ls0 ws0">9<span class="ff1">、请设计一个一<span class="_ _2"></span>百亿的计算器<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">.......................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">12</span><span class="fs2"> </span></span></span></span></span></div><div class="t m0 x3 h3 yc ff3 fs1 fc1 sc0 ls1 ws2">10<span class="ff1 ls0 ws0">、使用<span class="_ _0"> </span></span>final<span class="_ _0"> </span><span class="ff1 ls0 ws0">关键字修饰一个变<span class="_ _2"></span>量时，是引用<span class="_ _2"></span>不能变，还是引用<span class="_ _2"></span>的对象不能变？<span class="_ _2"></span><span class="ff4"> <span class="ls2 ws3">14</span><span class="fs2"> </span></span></span></div><div class="t m0 x3 h3 yd ff3 fs1 fc1 sc0 ls1 ws2">11<span class="ff1 ls0 ws0">、</span><span class="ls6 ws7">"=="<span class="_ _4"></span><span class="ff1 ls0 ws0">和<span class="_ _0"> </span></span></span>equals<span class="_ _0"> </span><span class="ff1 ls0 ws0">方法究竟有什<span class="_ _2"></span>么区别？<span class="ff4"> <span class="ls1 ws2">...................................................................</span> <span class="_ _2"></span><span class="ls2 ws3">14<span class="fs2 ls0 ws0"> </span></span></span></span></div><div class="t m0 x3 h3 ye ff3 fs1 fc1 sc0 ls1 ws2">12<span class="ff1 ls0 ws0">、静态变量和实例变量<span class="_ _2"></span>的区别？<span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">.................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">15</span><span class="fs2"> </span></span></span></span></span></div><div class="t m0 x3 h3 yf ff3 fs1 fc1 sc0 ls1 ws2">13<span class="ff1 ls0 ws0">、是否可以从一个<span class="_ _0"> </span></span><span class="ls7 ws8">stati<span class="_ _4"></span>c<span class="_"> </span><span class="ff1 ls0 ws0">方法内部<span class="_ _2"></span>发出对非<span class="_ _0"> </span><span class="ff3 ls8 ws9">sta<span class="_ _2"></span>tic<span class="_ _0"> </span><span class="ff1 ls0 ws0">方法的<span class="_ _2"></span>调用？<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">..........................<span class="ls0 ws0"> <span class="ls2 ws3">16</span><span class="fs2"> </span></span></span></span></span></span></span></span></div><div class="t m0 x3 h3 y10 ff3 fs1 fc1 sc0 ls1 ws2">14<span class="ff1 ls0 ws0">、</span><span class="ls7 ws8">In<span class="_ _4"></span>teg<span class="_ _4"></span>er<span class="_"> </span><span class="ff1 ls0 ws0">与<span class="_ _0"> </span></span>int<span class="_"> </span><span class="ff1 ls3 ws4">的区别<span class="ff4 ls0 ws0"> <span class="_ _1"></span><span class="ls1 ws2">................................................................................................<span class="ls0 ws0">. <span class="ls2 ws3">16<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></span></div><div class="t m0 x3 h3 y11 ff3 fs1 fc1 sc0 ls1 ws2">15<span class="ff1 ls0 ws0">、</span>Math.round(11.5)<span class="ff1 ls0 ws0">等於多少</span><span class="ws1">? Math.round(<span class="ls0 ws0">-</span></span>11.5)<span class="ff1 ls0 ws0">等於多少<span class="ff3">?<span class="ff4"> <span class="_ _7"></span><span class="ls1 ws2">................................<span class="ls0 ws0">. <span class="ls2 ws3">17<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></span></div><div class="t m0 x3 h3 y12 ff3 fs1 fc1 sc0 ls1 ws2">16<span class="ff1 ls0 ws0">、下面的代码有什么不<span class="_ _2"></span>妥之处<span class="ff3">?<span class="ff4"> <span class="ls1 ws2">..................................................................................</span> <span class="_ _2"></span><span class="ls2 ws3">17<span class="fs2 ls0 ws0"> </span></span></span></span></span></div><div class="t m0 x3 h3 y13 ff3 fs1 fc1 sc0 ls1 ws2">17<span class="ff1 ls0 ws0">、请说出作用域<span class="_ _0"> </span></span>public<span class="_ _2"></span><span class="ff1 ls0 ws0">，<span class="ff3 ls1 ws2">private</span>，<span class="ff3 ls1 ws2">protected</span>，以及不<span class="ls3 ws4">写时的区别</span><span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">.........................<span class="ls0 ws0"> <span class="ls2 ws3">17<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></div><div class="t m0 x3 h3 y14 ff3 fs1 fc1 sc0 ls1 ws2">18<span class="ff1 ls0 ws0">、</span>Overload<span class="_ _0"> </span><span class="ff1 ls0 ws0">和<span class="_ _0"> </span></span>Override<span class="_ _0"> </span><span class="ff1 ls0 ws0">的区别。</span>Overloaded<span class="_ _0"> </span><span class="ff1 ls0 ws0">的方法是<span class="_ _2"></span>否可以改变返<span class="_ _2"></span>回值的类型<span class="ff3">?</span></span></div><div class="t m0 x3 h4 y15 ff4 fs1 fc1 sc0 ls0 ws0"> <span class="_ _3"></span><span class="ls1 ws2">.............................................................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">18</span><span class="fs2"> </span></span></span></div><div class="t m0 x3 h3 y16 ff3 fs1 fc1 sc0 ls1 ws2">19<span class="ff1 ls0 ws0">、构造器<span class="_ _0"> </span></span><span class="ls7 ws8">Con<span class="_ _4"></span>st<span class="_ _4"></span>ruc<span class="_ _4"></span>tor<span class="_"> </span><span class="ff1 ls0 ws0">是否可被<span class="_ _0"> </span></span></span>override?<span class="ff4 ls0 ws0"> </span><span class="ff4">................................................................<span class="ls0 ws0"> <span class="_ _2"></span><span class="ls2 ws3">19<span class="fs2 ls0 ws0"> </span></span></span></span></div><div class="t m0 x3 h3 y17 ff3 fs1 fc1 sc0 ls1 ws2">20<span class="ff1 ls0 ws0">、<span class="_ _7"></span>接口是否<span class="_ _2"></span>可继承接口<span class="ff3">?</span>抽象类是<span class="_ _2"></span>否可实现<span class="ff3 ls2 ws3">(i<span class="ls1 ws2">mpl<span class="_ _2"></span>ements)<span class="ff1 ls0 ws0">接口<span class="ff3">?</span>抽象类是<span class="_ _2"></span>否可继承具</span></span></span></span></div><div class="t m0 x3 h3 y18 ff1 fs1 fc1 sc0 ls0 ws0">体类<span class="ff3 ls1 ws1">(concrete class)?</span>抽象类中是否可以<span class="_ _2"></span>有静态的<span class="_ _0"> </span><span class="ff3 ls9 wsa">main<span class="_ _0"> </span></span><span class="ls3 ws4">方法？</span><span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">................................<span class="ls0 ws0"> <span class="ls2 ws3">19</span></span></span></span></div><div class="t m0 x4 h5 y19 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m0 x3 h3 y1a ff3 fs1 fc1 sc0 ls1 ws2">21<span class="ff1 ls0 ws0">、写<span class="_ _0"> </span></span>clone()<span class="ff1 ls0 ws0">方法时，通常都有<span class="_ _8"></span>一行代码，是什么？<span class="_ _2"></span><span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">................................................<span class="ls0 ws0"> <span class="ls2 ws3">19</span><span class="fs2"> </span></span></span></span></span></div><div class="t m0 x3 h3 y1b ff3 fs1 fc1 sc0 ls1 ws2">22<span class="ff1 ls0 ws0">、面向对象的特征有哪<span class="_ _8"></span>些方面<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">.....................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">19<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></div><div class="t m0 x3 h3 y1c ff3 fs1 fc1 sc0 ls1 ws2">23<span class="ff1 ls0 ws0">、</span><span class="ls3 ws4">ja<span class="_ _4"></span>va<span class="_"> </span><span class="ff1 ls0 ws0">中实现<span class="_ _8"></span>多态的机制是什么？<span class="ff4"> <span class="_ _2"></span><span class="ls1 ws2">............................................................................<span class="ls0 ws0"> <span class="ls2 ws3">21</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m0 x3 h3 y1d ff3 fs1 fc1 sc0 ls1 ws2">24<span class="ff1 ls0 ws0">、</span><span class="ws1">abstract class<span class="_ _0"> </span><span class="ff1 ls0 ws0">和<span class="_ _0"> </span></span></span>interface<span class="_ _0"> </span><span class="ff1 ls0 ws0">有什么区别<span class="ff3">?<span class="_ _8"></span><span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">................................................................<span class="ls0 ws0"> <span class="_ _2"></span><span class="ls2 ws3">21<span class="fs2 ls0 ws0"> </span></span></span></span></span></span></span></div><div class="t m0 x3 h3 y1e ff3 fs1 fc1 sc0 ls1 ws2">25<span class="ff1 ls0 ws0">、</span>abstract<span class="_ _0"> </span><span class="ff1 ls0 ws0">的<span class="_ _0"> </span></span>method<span class="_ _0"> </span><span class="ff1 ls0 ws0">是否可同时是<span class="_ _0"> </span></span><span class="ls3 ws4">stat<span class="_ _4"></span>ic,<span class="ff1 ls0 ws0">是否可同时是<span class="_ _0"> </span></span><span class="ls7 ws8">nat<span class="_ _4"></span>ive<span class="_ _4"></span><span class="ff1 ls0 ws0">，是否可同时是</span></span></span></div><div class="t m0 x3 h6 y1f ff3 fs1 fc1 sc0 ls1 ws2">synchronized?<span class="ff4 ls0 ws0"> <span class="_ _8"></span><span class="ls1 ws2">...................................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">23</span></span></span></span></div><div class="t m0 x4 h5 y20 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m0 x3 h3 y21 ff3 fs1 fc1 sc0 ls1 ws2">26<span class="ff1 ls0 ws0">、什么是内部类？</span><span class="ls9 wsb">Static Nested Class<span class="_"> </span><span class="ff1 ls0 ws0">和<span class="_ _0"> </span></span></span><span class="ws3">Inner Cl<span class="_ _2"></span>ass<span class="_"> </span><span class="ff1 ls0 ws0">的不同。<span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">...........................<span class="ls0 ws0"> <span class="ls2 ws3">24</span><span 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<div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://csdnimg.cn/release/download_crawler_static/10022184/bg2.jpg"><div class="t m2 x3 h3 y24 ff3 fs1 fc1 sc0 ls1 ws2">27<span class="ff1 ls0 ws0">、内部类可以引用它的<span class="_ _8"></span>包含类的成员吗？有没有<span class="_ _2"></span>什么限制？<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">................................<span class="ls0 ws0">. <span class="ls2 ws3">26</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y25 ff3 fs1 fc1 sc0 ls1 ws2">28<span class="ff1 ls0 ws0">、<span class="_ _3"></span><span class="ff3 ls1 wsc">Anonymous Inner Class (<span class="ff1 ls3 ws4">匿名<span class="_ _4"></span>内部类<span class="_ _4"></span></span><span class="ls0 ws0">)<span class="ff1 ls3 ws4">是否可以<span class="_ _9"> </span></span></span><span class="ws2">extends(<span class="ff1 ls0 ws0">继承<span class="ff3">)</span>其它类，<span class="_ _3"></span>是否可以</span></span></span></span></div><div class="t m2 x3 h3 y26 ff3 fs1 fc1 sc0 ls1 ws2">implements(<span class="ff1 ls0 ws0">实现</span>)interface(<span class="ff1 ls0 ws0">接口</span><span class="ls2 ws3">)?<span class="ff4 ls0 ws0"> <span class="_ _5"></span><span class="ls1 ws2">..................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">27</span></span></span></span></span></div><div class="t m2 x4 h5 y27 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y28 ff3 fs1 fc1 sc0 ls1 ws2">29<span class="ff1 ls0 ws0">、</span>super.getClass()<span class="ff1 ls0 ws0">方法调用<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">.......................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">27</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y29 ff3 fs1 fc1 sc0 ls1 ws2">30<span class="ff1 ls0 ws0">、</span><span class="ls7 ws8">St<span class="_ _4"></span>ri<span class="_ _4"></span>ng<span class="_"> </span><span class="ff1 ls0 ws0">是最基本<span class="_ _2"></span>的数据类型吗<span class="ff3">?<span class="_ _2"></span><span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">...............................................................................<span class="ls0 ws0"> <span class="ls2 ws3">28<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></span></span></div><div class="t m2 x3 h3 y2a ff3 fs1 fc1 sc0 ls1 ws2">31<span class="ff1 ls0 ws0">、<span class="_ _3"></span><span class="ff3 ls9 wsd">String<span class="_ _4"></span> s = "Hello"<span class="_ _4"></span>;s = s + "<span class="_ _4"></span> world!";<span class="ff1 ls0 ws0">这两行代码执行后，<span class="_ _3"></span>原始的<span class="_ _0"> </span><span class="ff3 ls7 ws8">Stri<span class="_ _4"></span>ng<span class="_"> </span></span>对象中的内</span></span></span></div><div class="t m2 x3 h3 y2b ff1 fs1 fc1 sc0 ls0 ws0">容到底变了没有？<span class="_ _8"></span><span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">.............................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">28</span></span></span></span></div><div class="t m2 x4 h5 y2c ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y2d ff3 fs1 fc1 sc0 ls1 ws2">32<span class="ff1 ls0 ws0">、是否可以继承<span class="_ _0"> </span></span><span class="lsa wse">Str<span class="_ _4"></span>ing<span class="_"> </span><span class="ff1 ls0 ws0">类<span class="ff3">?<span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">..........................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">29</span><span class="fs2"> </span></span></span></span></span></span></span></div><div class="t m2 x3 h3 y2e ff3 fs1 fc1 sc0 ls1 ws2">33<span class="ff1 ls0 ws0">、</span><span class="ls2 wsf">Strin<span class="_ _8"></span>g<span class="_ _4"></span> s = new<span class="_ _2"></span> String(<span class="_ _2"></span>"xyz<span class="_ _8"></span>");<span class="ff1 ls3 ws4">创建<span class="_ _4"></span>了几个<span class="_ _9"> </span></span><span class="ls8 ws0">Strin<span class="_ _8"></span>g Objec<span class="_ _8"></span>t?<span class="ff1 ls0">二者之间有什<span class="_ _2"></span>么区别？</span></span></span></div><div class="t m2 x3 h4 y2f ff4 fs1 fc1 sc0 ls0 ws0"> <span class="_ _3"></span><span class="ls1 ws2">.............................................................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">29</span></span></span></div><div class="t m2 x4 h5 y30 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y31 ff3 fs1 fc1 sc0 ls1 ws2">34<span class="ff1 ls0 ws0">、</span><span class="ls7 ws8">St<span class="_ _4"></span>ri<span class="_ _4"></span>ng<span class="_"> </span><span class="ff1 ls0 ws0">和<span class="_ _0"> </span></span>Str<span class="_ _4"></span>ing<span class="_ _4"></span>Buf<span class="_ _4"></span>fer<span class="_"> </span><span class="ff1 ls3 ws4">的区别<span class="ff4 ls0 ws0"> <span class="_ _8"></span><span class="ls1 ws2">..................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">30</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y32 ff3 fs1 fc1 sc0 ls1 ws2">35<span class="ff1 ls0 ws0">、如何把一段逗号分割<span class="_ _8"></span>的字符串转换成一个数组<span class="_ _2"></span><span class="ff3">?<span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">...................................................<span class="ls0 ws0"> <span class="ls2 ws3">30<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></span></div><div class="t m2 x3 h3 y33 ff3 fs1 fc1 sc0 ls1 ws2">36<span class="ff1 ls0 ws0">、数组有没有<span class="_ _0"> </span></span><span class="ls7 ws8">leng<span class="_ _4"></span>th(<span class="_ _4"></span>)<span class="ff1 ls0 ws0">这个方法</span><span class="ws10">? S<span class="_ _4"></span>tr<span class="_ _4"></span>ing<span class="_"> </span><span class="ff1 ls3 ws4">有没有<span class="_ _0"> </span></span></span></span>lengt<span class="_ _4"></span>h()<span class="ff1 ls3 ws4">这个方法？<span class="ff4 ls0 ws0"> <span class="_ _1"></span><span class="ls1 ws2">.....................<span class="ls0 ws0"> <span class="ls2 ws3">31</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y34 ff3 fs1 fc1 sc0 ls1 ws2">37<span class="ff1 ls0 ws0">、下面这条语句一共创<span class="_ _8"></span>建了多少个对象：<span class="ff3 ls2 wsf">Strin<span class="_ _8"></span>g s="a"+"b<span class="_ _8"></span>"+"c"+"d";<span class="_ _8"></span><span class="ff4 ls0 ws0"> <span class="_ _3"></span><span class="ls1 ws2">.....................<span class="ls0 ws0"> <span class="ls2 ws3">31</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y35 ff3 fs1 fc1 sc0 ls1 ws2">38<span class="ff1 ls0 ws0">、</span><span class="ls3 ws4">tr<span class="_ _4"></span>y <span class="ls6 ws7">{}<span class="ff1 ls0 ws0">里有一个<span class="_ _0"> </span></span><span class="ls7 ws8">re<span class="_ _4"></span>tur<span class="_ _4"></span>n<span class="_"> </span><span class="ff1 ls0 ws0">语句，那<span class="_ _8"></span>么紧跟在这个<span class="_ _0"> </span><span class="ff3 ls2 ws3">try<span class="_ _0"> </span></span>后的<span class="_ _a"> </span><span class="ff3 ls9 wsb">fin<span class="_ _4"></span>ally {}</span><span class="ls3 ws4">里的<span class="_ _0"> </span><span class="ff3 ls7 ws8">c<span class="_ _4"></span>ode<span class="_"> </span></span></span>会不会</span></span></span></span></div><div class="t m2 x3 h3 y36 ff1 fs1 fc1 sc0 ls0 ws0">被执行，什么时候被执<span class="_ _8"></span>行，在<span class="_ _0"> </span><span class="ff3 ls2 ws3">return<span class="_ _a"> </span></span>前还是后<span class="ff3">?<span class="_ _2"></span><span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">...........................................................<span class="ls0 ws0"> <span class="ls2 ws3">31</span></span></span></span></span></div><div class="t m2 x4 h5 y37 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y38 ff3 fs1 fc1 sc0 ls1 ws2">39<span class="ff1 ls0 ws0">、下面的程序代码输出<span class="_ _8"></span>的结果是多少？<span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">.....................................................................<span class="ls0 ws0"> <span class="ls2 ws3">32</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y39 ff3 fs1 fc1 sc0 ls1 ws2">40<span class="ff1 ls0 ws0">、</span><span class="ls9 ws11">final,<span class="_ _4"></span> fin<span class="_ _4"></span>ally, f<span class="_ _4"></span>inalize<span class="_"> </span><span class="ff1 ls0 ws0">的区别。<span class="_ _8"></span><span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">.................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">35</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y3a ff3 fs1 fc1 sc0 ls1 ws2">41<span class="ff1 ls0 ws0">、运行时异常与一般异<span class="_ _8"></span>常有何异同？<span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">.........................................................................<span class="ls0 ws0"> <span class="ls2 ws3">35</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y3b ff3 fs1 fc1 sc0 ls1 ws2">42<span class="ff1 ls0 ws0">、</span><span class="ls2 ws3">error<span class="_ _a"> </span><span class="ff1 ls0 ws0">和<span class="_ _0"> </span></span></span>exception<span class="_ _a"> </span><span class="ff1 ls0 ws0">有什么区别<span class="ff3">?<span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">..............................................................................<span class="ls0 ws0"> <span class="ls2 ws3">35</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y3c ff3 fs1 fc1 sc0 ls1 ws2">43<span class="ff1 ls0 ws0">、</span><span class="ls3 ws4">Java<span class="_"> </span><span class="ff1 ls0 ws0">中的异常处理机制的简<span class="_ _8"></span>单原理和应用。<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">.......................................................<span class="ls0 ws0"> <span class="ls2 ws3">35</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y3d ff3 fs1 fc1 sc0 ls1 ws2">44<span class="ff1 ls0 ws0">、请写出你最常见到<span class="_ _8"></span>的<span class="_ _0"> </span><span class="ff3">5<span class="_"> </span></span>个<span class="_ _a"> </span><span class="ff3 ls1 ws1">runtime excepti<span class="ws2">on</span></span>。<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">....................................................<span class="ls0 ws0"> <span class="ls2 ws3">36<span class="_ _8"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y3e ff3 fs1 fc1 sc0 ls1 ws2">45<span class="ff1 ls0 ws0">、</span><span class="ls4 ws5">JAVA<span class="_ _0"> </span><span class="ff1 ls0 ws0">语言如何进行异常处理<span class="_ _2"></span>，关键字：<span class="ff3 ls8 ws9">th<span class="_ _2"></span>row<span class="_ _8"></span>s,throw<span class="_ _2"></span>,try,ca<span class="_ _8"></span>tch,fina<span class="_ _2"></span>lly<span class="_ _a"> </span><span class="ff1 ls0 ws0">分别代表</span></span></span></span></div><div class="t m2 x3 h3 y3f ff1 fs1 fc1 sc0 ls0 ws0">什么意义？在<span class="_ _a"> </span><span class="ff3 ls2 ws3">try<span class="_ _a"> </span></span>块中可以抛出异常吗？<span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">.......................................................................<span class="ls0 ws0"> <span class="ls2 ws3">36</span></span></span></span></div><div class="t m2 x4 h5 y40 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y41 ff3 fs1 fc1 sc0 ls1 ws2">46<span class="ff1 ls0 ws0">、</span><span class="ls3 ws4">ja<span class="_ _4"></span>va<span class="_"> </span><span class="ff1 ls0 ws0">中有几<span class="_ _8"></span>种方法可以实现一个线程？用什<span class="_ _8"></span>么关键字修饰同步方法<span class="ff3 ls1 ws3">? stop()</span>和</span></span></div><div class="t m2 x3 h3 y42 ff3 fs1 fc1 sc0 ls1 ws2">suspend()<span class="ff1 ls0 ws0">方法为何不推荐使用？<span class="_ _2"></span><span class="ff4"> <span class="_ _2"></span><span class="ls1 ws2">...................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">36</span></span></span></span></span></div><div class="t m2 x4 h5 y43 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y44 ff3 fs1 fc1 sc0 ls1 ws2">47<span class="ff1 ls0 ws0">、</span>sleep()<span class="ff1 ls0 ws0">和<span class="ff3"> <span class="_ _a"> </span><span class="ls5 ws6">wai<span class="_ _4"></span>t(<span class="_ _4"></span>)<span class="_ _4"></span></span></span>有什么区别<span class="ff3">?<span class="ff4"> </span></span></span><span class="ff4">..................................................................................<span class="ls0 ws0"> <span class="_ _2"></span><span class="ls2 ws3">38<span class="fs2 ls0 ws0"> </span></span></span></span></div><div class="t m2 x3 h3 y45 ff3 fs1 fc1 sc0 ls1 ws2">48<span class="ff1 ls0 ws0">、同步和异步有何异同<span class="_ _8"></span>，在什么情况下分别使用<span class="_ _2"></span>他们？举例说<span class="ls3 ws4">明。</span><span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">.....................<span class="ls0 ws0"> <span class="ls2 ws3">41<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y46 ff3 fs1 fc1 sc0 ls1 ws2">49.<span class="_ _b"> </span><span class="ff1 ls0 ws0">下面两个方法同步<span class="_ _8"></span>吗？（自己发明）<span class="ff4"> <span class="_ _7"></span><span class="ls1 ws2">......................................................................<span class="ls0 ws0"> <span class="ls2 ws3">41</span></span></span></span></span></div><div class="t m2 x3 h3 y47 ff3 fs1 fc1 sc0 ls1 ws2">50<span class="ff1 ls0 ws0">、多线程有几种实现方<span class="_ _8"></span>法<span class="ff3">?</span>同步有几种实现方法<span class="ff3">?<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">....................................................<span class="ls0 ws0"> <span class="ls2 ws3">42</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y48 ff3 fs1 fc1 sc0 ls1 ws2">51<span class="ff1 ls0 ws0">、启动一个线程是用<span class="_ _a"> </span></span>run()<span class="ff1 ls3 ws4">还是<span class="_ _0"> </span></span><span class="ls2 ws12">start()?<span class="_ _8"></span> .<span class="ff4 ls0 ws0"> <span class="ls1 ws2">...................................................................</span> <span class="ls2 ws3">42</span><span class="fs2"> </span></span></span></div><div class="t m2 x3 h3 y49 ff3 fs1 fc1 sc0 ls1 ws2">52<span class="ff1 ls0 ws0">、当一个线程进入一个<span class="_ _8"></span>对象的一个<span class="_ _0"> </span><span class="ff3 ls1 ws2">synchron<span class="ls3 ws4">ize<span class="_ _4"></span>d<span class="_"> </span></span></span>方法后，<span class="_ _8"></span>其它线程是否可进入此</span></div><div class="t m2 x3 h3 y4a ff1 fs1 fc1 sc0 ls0 ws0">对象的其它方法<span class="ff3">?<span class="_ _2"></span><span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">...............................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">42</span></span></span></span></span></div><div class="t m2 x4 h5 y4b ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="c x5 y22 w2 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<div id="pf3" class="pf w0 h0" data-page-no="3"><div class="pc pc3 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://csdnimg.cn/release/download_crawler_static/10022184/bg3.jpg"><div class="t m2 x3 h3 y24 ff3 fs1 fc1 sc0 ls1 ws2">53<span class="ff1 ls0 ws0">、线程的基本概念、线<span class="_ _8"></span>程的基本状态以及状态之<span class="_ _2"></span>间的关系<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">.....................................<span class="ls0 ws0"> <span class="ls2 ws3">43</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y4c ff3 fs1 fc1 sc0 ls1 ws2">54<span class="ff1 ls0 ws0">、简述<span class="_ _0"> </span></span>synchronized<span class="_ _a"> </span><span class="ff1 ls0 ws0">和<span class="_ _0"> </span></span>j<span class="_ _4"></span>ava.util.concurrent.locks.Lock<span class="_"> </span><span class="ff1 ls0 ws0">的异同<span class="_ _8"></span>？<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">........................<span class="ls0 ws0"> <span class="ls2 ws3">43<span class="_ _8"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y4d ff3 fs1 fc1 sc0 ls1 ws2">55<span class="ff1 lsb ws13">、设<span class="_ _c"> </span>计<span class="_ _d"> </span></span><span class="ls0 ws0">4<span class="_ _0"> </span><span class="ff1">个线程，<span class="_ _3"></span>其中两个线程<span class="_ _8"></span>每次对<span class="_ _0"> </span><span class="ff3">j<span class="_"> </span></span><span class="ls3 ws4">增加<span class="_ _0"> </span></span><span class="ff3">1</span>，<span class="_ _3"></span>另外两个线程对<span class="_ _a"> </span><span class="ff3">j<span class="_ _a"> </span></span>每次减少<span class="_ _0"> </span><span class="ff3">1</span><span class="lsb ws13">。写</span></span></span></div><div class="t m2 x3 h3 y4e ff1 fs1 fc1 sc0 ls0 ws0">出程序。<span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">.............................................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">46</span></span></span></span></div><div class="t m2 x4 h5 y28 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y4f ff3 fs1 fc1 sc0 ls1 ws2">56<span class="ff1 ls0 ws0">、子线程循环<span class="_ _a"> </span><span class="ff3">10<span class="_ _0"> </span></span>次，接着主线程循环<span class="_ _a"> </span></span>100<span class="ff1 ls0 ws0">，接着又回到<span class="_ _2"></span>子线程循环<span class="_ _a"> </span><span class="ff3 ls1 ws2">10<span class="_"> </span></span>次，接着</span></div><div class="t m2 x3 h3 y50 ff1 fs1 fc1 sc0 ls0 ws0">再回到主线程又循环<span class="_ _a"> </span><span class="ff3 ls1 ws2">100</span>，如此循环<span class="_ _a"> </span><span class="ff3 ls1 ws2">50<span class="_"> </span></span>次，<span class="_ _2"></span>请写出程序。<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">.......................................<span class="ls0 ws0"> <span class="ls2 ws3">48</span></span></span></span></div><div class="t m2 x4 h5 y51 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y2c ff3 fs1 fc1 sc0 ls1 ws2">57<span class="ff1 ls0 ws0">、介绍<span class="_ _0"> </span></span><span class="ls9 wsa">Collectio<span class="_ _4"></span>n<span class="_ _0"> </span><span class="ff1 ls0 ws0">框架的结构<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">.....................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">56<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></span></div><div class="t m2 x3 h3 y2d ff3 fs1 fc1 sc0 ls1 ws2">58<span class="ff1 ls0 ws0">、</span><span class="ls9 wsa">Collectio<span class="_ _4"></span>n<span class="_ _0"> </span><span class="ff1 ls0 ws0">框架中实现比较要实现什<span class="_ _8"></span>么接口<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">..........................................................<span class="ls0 ws0"> <span class="ls2 ws3">56</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y52 ff3 fs1 fc1 sc0 ls1 ws2">59<span class="ff1 ls0 ws0">、</span>ArrayList<span class="_"> </span><span class="ff1 ls0 ws0">和<span class="_ _a"> </span></span>Vector<span class="_ _0"> </span><span class="ff1 ls0 ws0">的区别<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">......................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">56</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y53 ff3 fs1 fc1 sc0 ls1 ws2">60<span class="ff1 ls0 ws0">、</span>HashMap<span class="_ _a"> </span><span class="ff1 ls0 ws0">和<span class="_ _0"> </span></span>Hashtable<span class="_"> </span><span class="ff1 ls0 ws0">的区别<span class="ff4"> <span class="_ _7"></span><span class="ls1 ws2">...............................................................................<span class="ls0 ws0"> <span class="ls2 ws3">57</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y54 ff3 fs1 fc1 sc0 ls1 ws2">61<span class="ff1 ls0 ws0">、</span><span class="ls9 wsa">List<span class="_"> </span><span class="ff1 ls0 ws0">和<span class="ff3"> <span class="_ _a"> </span><span class="lsc ws10">Map<span class="_"> </span></span></span>区别<span class="ff3">?<span class="ff4"> <span class="_ _2"></span><span class="ls1 ws2">....................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">57</span><span class="fs2"> </span></span></span></span></span></span></span></div><div class="t m2 x3 h3 y55 ff3 fs1 fc1 sc0 ls1 ws2">62<span class="ff1 ls0 ws0">、</span><span class="ws1">List, Set, Map<span class="_ _a"> </span><span class="ff1 ls0 ws0">是否继承自<span class="_ _0"> </span></span><span class="ls9 wsa">Collect<span class="_ _4"></span>ion<span class="_"> </span><span class="ff1 ls0 ws0">接口<span class="ff3">?<span class="_ _8"></span><span class="ff4 ls1 ws2">..........................................................<span class="ls0 ws0"> <span class="ls2 ws3">58</span><span class="fs2"> </span></span></span></span></span></span></span></div><div class="t m2 x3 h3 y56 ff3 fs1 fc1 sc0 ls1 ws2">63<span class="ff1 ls0 ws0">、</span><span class="ls9 wsa">List<span class="ff1 ls0 ws0">、</span><span class="lsc ws10">Ma<span class="_ _4"></span>p<span class="_ _4"></span><span class="ff1 ls0 ws0">、</span><span class="ls4 ws5">Set<span class="_"> </span><span class="ff1 ls0 ws0">三<span class="_ _8"></span>个接口，存取元素时，各有什么特<span class="_ _8"></span>点？<span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">................................<span class="ls0 ws0"> <span class="ls2 ws3">58</span><span class="fs2"> </span></span></span></span></span></span></span></span></div><div class="t m2 x3 h3 y57 ff3 fs1 fc1 sc0 ls1 ws2">64<span class="ff1 ls0 ws0">、说出<span class="_ _0"> </span></span><span class="ws1">ArrayList,Vector, LinkedList<span class="_ _0"> </span><span class="ff1 ls0 ws0">的存储性能<span class="_ _2"></span>和特性<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">..........................................<span class="ls0 ws0"> <span class="ls2 ws3">59</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y58 ff3 fs1 fc1 sc0 ls1 ws2">65<span class="ff1 ls0 ws0">、去掉一个<span class="_ _a"> </span></span><span class="ls4 ws5">Vec<span class="_ _4"></span>t<span class="ls7 ws8">or<span class="_"> </span><span class="ff1 ls0 ws0">集合中重复<span class="_ _2"></span>的元素<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">.......................................................................<span class="ls0 ws0"> <span class="ls2 ws3">59</span><span class="fs2"> </span></span></span></span></span></span></span></div><div class="t m2 x3 h3 y59 ff3 fs1 fc1 sc0 ls1 ws2">66<span class="ff1 ls0 ws0">、</span><span class="ls9 wsa">Collectio<span class="_ _4"></span>n<span class="_ _0"> </span><span class="ff1 ls0 ws0">和<span class="ff3"> <span class="_ _a"> </span></span></span>Collect<span class="_ _4"></span>ions<span class="_"> </span><span class="ff1 ls0 ws0">的区别<span class="_ _8"></span>。<span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">........................................................................<span class="ls0 ws0"> <span class="ls2 ws3">59</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y5a ff3 fs1 fc1 sc0 ls1 ws2">67<span class="ff1 ls0 ws0">、</span><span class="ls4 ws5">Set<span class="_"> </span><span class="ff1 ls0 ws0">里的<span class="_ _2"></span>元素是不能重复的，<span class="_ _8"></span>那么用什么方法来区分重<span class="_ _2"></span>复与否呢<span class="ff3">?</span>是用<span class="ff3 ls6 ws7">==</span>还是</span></span></div><div class="t m2 x3 h3 y5b ff3 fs1 fc1 sc0 ls1 ws2">equals()?<span class="ff1 ls0 ws0">它们有何区别<span class="ff3">?<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">..................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">60</span></span></span></span></span></span></div><div class="t m2 x4 h5 y5c ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y5d ff3 fs1 fc1 sc0 ls1 ws2">68<span class="ff1 ls0 ws0">、你所知道的集合类都<span class="_ _8"></span>有哪些？主要方法？<span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">.............................................................<span class="ls0 ws0"> <span class="ls2 ws3">60</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y5e ff3 fs1 fc1 sc0 ls1 ws2">69<span class="ff1 ls0 ws0">、<span class="_ _8"></span>两个对象值相同<span class="ff3 ls2 ws14">(x<span class="_ _8"></span>.<span class="_ _4"></span>equa<span class="_ _2"></span>ls(y<span class="_ _2"></span>) == true)<span class="ff1 ls0 ws0">，<span class="_ _1"></span>但却可有不同的<span class="_ _0"> </span><span class="ff3 ls1 wsc">hash code</span>，<span class="_ _8"></span>这句话对不</span></span></span></div><div class="t m2 x3 h3 y5f ff1 fs1 fc1 sc0 ls0 ws0">对<span class="ff3">?<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">.......................................................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">61</span></span></span></span></span></div><div class="t m2 x4 h5 y3c ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y60 ff3 fs1 fc1 sc0 ls1 ws2">70<span class="ff1 ls0 ws0">、<span class="_ _8"></span><span class="ff3 ls1 ws2">TreeSet<span class="_ _0"> </span><span class="ff1 ls0 ws0">里面放对象<span class="_ _2"></span>，<span class="_ _8"></span>如果同时放入了父类<span class="_ _8"></span>和子类的实例对象，<span class="_ _8"></span>那比<span class="_ _2"></span>较时使用的</span></span></span></div><div class="t m2 x3 h3 y61 ff1 fs1 fc1 sc0 ls0 ws0">是父类的<span class="_ _a"> </span><span class="ff3 ls7 ws8">c<span class="_ _4"></span>om<span class="_ _4"></span>par<span class="_ _4"></span>eT<span class="_ _4"></span>o<span class="_"> </span></span>方<span class="_ _2"></span>法，还是使用的子类的<span class="_ _a"> </span><span class="ff3 ls1 ws2">compareTo<span class="_ _a"> </span></span>方法，还是抛异常！<span class="ff4"> <span class="_ _3"></span>. <span class="ls2 ws3">61</span></span></div><div class="t m2 x4 h5 y62 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y40 ff3 fs1 fc1 sc0 ls1 ws2">71<span class="ff1 ls0 ws0">、说出一些常用的类，<span class="_ _8"></span>包，接口，请各举<span class="_ _0"> </span><span class="ff3">5<span class="_ _a"> </span></span>个<span class="ff4 ls1 ws2">.........................................................</span><span class="ff4"> <span class="ls2 ws3">63</span><span class="fs2"> </span></span></span></div><div class="t m2 x3 h3 y41 ff3 fs1 fc1 sc0 ls1 ws2">72<span class="ff1 ls0 ws0">、</span><span class="ls3 ws4">ja<span class="_ _4"></span>va<span class="_"> </span><span class="ff1 ls0 ws0">中有几<span class="_ _8"></span>种类型的流？<span class="ff3 ls9 wsa">JDK<span class="_"> </span></span>为每种类<span class="_ _8"></span>型的流提供了一些抽象类以<span class="_ _2"></span>供继承，请</span></span></div><div class="t m2 x3 h3 y42 ff1 fs1 fc1 sc0 ls0 ws0">说出他们分别是哪些类<span class="_ _8"></span>？<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">................................................................................................<span class="ls0 ws0">. <span class="ls2 ws3">63</span></span></span></span></div><div class="t m2 x4 h5 y43 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y44 ff3 fs1 fc1 sc0 ls1 ws2">73<span class="ff1 ls0 ws0">、字节流与字符流的区<span class="_ _8"></span>别<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">.............................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">63<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y63 ff3 fs1 fc1 sc0 ls1 ws2">74<span class="ff1 ls0 ws0">、什么是<span class="_ _a"> </span></span><span class="ls3 ws4">j<span class="_ _4"></span>ava<span class="_"> </span><span class="ff1 ls0 ws0">序列化，如何实<span class="_ _2"></span>现<span class="_ _0"> </span><span class="ff3 ls3 ws4">ja<span class="_ _4"></span>va<span class="_"> </span></span>序列<span class="_ _2"></span>化？或者请解释<span class="_ _a"> </span><span class="ff3 ls1 ws2">Serializable<span class="_ _0"> </span></span>接口的作</span></span></div><div class="t m2 x3 h3 y64 ff1 fs1 fc1 sc0 ls0 ws0">用。<span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">.....................................................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">65</span></span></span></span></div><div class="t m2 x4 h5 y65 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y66 ff3 fs1 fc1 sc0 ls1 ws2">75<span class="ff1 ls0 ws0">、描述一下<span class="_ _a"> </span></span><span class="ls4 ws5">JVM<span class="_"> </span><span class="ff1 ls0 ws0">加载<span class="_ _a"> </span><span class="ff3">class<span class="_ _0"> </span></span>文件的原理机<span class="_ _2"></span>制<span class="ff3">?<span class="ff4"> <span class="ls1 ws2">.........................................................</span> <span class="ls2 ws3">66<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y67 ff3 fs1 fc1 sc0 ls1 ws2">76<span class="ff1 ls0 ws0">、</span>heap<span class="_ _0"> </span><span class="ff1 ls0 ws0">和<span class="_ _0"> </span></span><span class="ls3 ws4">sta<span class="_ _4"></span>ck<span class="_"> </span><span class="ff1 ls0 ws0">有什<span class="_ _2"></span>么区别。<span class="ff4"> <span class="ls1 ws2">...................................................................................</span> <span class="ls2 ws3">66<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></div><div class="t m2 x3 h3 y68 ff3 fs1 fc1 sc0 ls1 ws2">77<span class="ff1 ls0 ws0">、</span><span class="ls8 ws9">GC<span class="_ _a"> </span><span class="ff1 ls3 ws4">是什<span class="_ _4"></span>么</span><span class="ls0 ws0">?<span class="ff1 ls3 ws4">为什么要<span class="_ _4"></span>有<span class="_ _0"> </span></span><span class="ls9 wsa">G<span class="_ _4"></span>C?</span><span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">..................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">66<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></span></div><div class="t m2 x3 h3 y4b ff3 fs1 fc1 sc0 ls1 ws2">78<span class="ff1 ls0 ws0">、垃圾回收的优点和原<span class="_ _8"></span>理。并考虑<span class="_ _0"> </span><span class="ff3">2<span class="_"> </span></span>种回<span class="_ _8"></span>收机制。<span class="ff4 ls1 ws2">.................................................</span><span class="ff4"> <span class="ls2 ws3">66</span><span class="fs2"> </span></span></span></div><div class="c x5 y22 w2 h7"><div class="t m2 x0 h8 y23 ff5 fs3 fc1 sc0 ls0 ws0">牛客网-程序员笔试面试题库，程序员求职备考网站 <span class="_ _7"></span>http://www.nowcoder.com</div></div><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" 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<div id="pf4" class="pf w0 h0" data-page-no="4"><div class="pc pc4 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://csdnimg.cn/release/download_crawler_static/10022184/bg4.jpg"><div class="t m2 x3 h3 y69 ff3 fs1 fc1 sc0 ls1 ws2">79<span class="ff1 ls0 ws0">、<span class="_ _e"></span>垃圾回收器的基本原<span class="_ _8"></span>理是什么？垃圾回收器可<span class="_ _2"></span>以马上回收内存吗？有<span class="_ _8"></span>什么办法主</span></div><div class="t m2 x3 h3 y6a ff1 fs1 fc1 sc0 ls0 ws0">动通知虚拟机进行垃圾<span class="_ _8"></span>回收？<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">.........................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">66</span></span></span></span></div><div class="t m2 x4 h5 y6b ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y27 ff3 fs1 fc1 sc0 ls1 ws2">80<span class="ff1 ls0 ws0">、什么时候用<span class="_ _a"> </span><span class="ff3">assert</span>。<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">................................................................................................<span class="ls0 ws0">. <span class="ls2 ws3">67<span class="_ _2"></span><span class="fs2 ls0 ws0"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y28 ff3 fs1 fc1 sc0 ls1 ws2">81<span class="ff1 ls0 ws0">、</span><span class="ls3 ws4">ja<span class="_ _4"></span>va<span class="_"> </span><span class="ff1 ls0 ws0">中会存<span class="_ _8"></span>在内存泄漏吗，请简单描述。<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">............................................................<span class="ls0 ws0"> <span class="ls2 ws3">68</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y29 ff3 fs1 fc1 sc0 ls1 ws2">82<span class="ff1 ls0 ws0">、能不能自己写个类，<span class="_ _8"></span>也叫<span class="_ _0"> </span><span class="ff3 ls1 ws2">j<span class="_ _4"></span>ava.lang.String</span>？<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">........................................................<span class="ls0 ws0"> <span class="_ _8"></span><span class="ls2 ws3">72<span class="fs2 ls0 ws0"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y6c ff3 fs1 fc1 sc0 ls1 ws1">83.<span class="_"> </span>Java<span class="_ _0"> </span><span class="ff1 ls0 ws0">代码查错<span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">.............................................................................................................<span class="ls0 ws0"> <span class="_ _2"></span><span class="ls2 ws3">73</span></span></span></span></span></div><div class="t m2 x2 h3 y6d ff1 fs1 fc1 sc0 ls0 ws0">二<span class="ff3">.</span>算法与编程<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">........................................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">77</span><span class="fs2"> </span></span></span></span></div><div class="t m2 x3 h3 y6e ff3 fs1 fc1 sc0 ls0 ws0">1<span class="ff1">、编写一个程序<span class="_ _2"></span>，将<span class="_ _0"> </span><span class="ff3 ls7 ws8">a.t<span class="_ _4"></span>xt<span class="_"> </span></span>文件中的单词与<span class="_ _a"> </span><span class="ff3 ls8 ws9">b.tx<span class="_ _2"></span>t<span class="_ _a"> </span><span class="ff1 ls0 ws0">文件中的单词交替合并到<span class="_ _a"> </span></span><span class="ls3 ws4">c<span class="_ _4"></span>.txt<span class="_"> </span><span class="ff1 ls0 ws0">文件</span></span></span></span></div><div class="t m2 x3 h3 y6f ff1 fs1 fc1 sc0 ls0 ws0">中，<span class="ff3 ls3 ws4">a.t<span class="_ _4"></span>xt<span class="_"> </span></span>文件中的单词<span class="_ _8"></span>用回车符分隔，<span class="ff3 ls8 ws9">b.tx<span class="_ _8"></span>t<span class="_"> </span><span class="ff1 ls0 ws0">文件<span class="_ _2"></span>中用回车或空格进<span class="_ _8"></span>行分隔。<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">........<span class="ls0 ws0"> <span class="ls2 ws3">77</span></span></span></span></span></span></div><div class="t m2 x4 h5 y52 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y70 ff3 fs1 fc1 sc0 ls0 ws0">2<span class="ff1">、编写一个程序<span class="_ _2"></span>，将<span class="_ _0"> </span><span class="ff3 ls7 ws8">d:</span><span class="ff3">\<span class="ls3 ws4">ja<span class="_ _4"></span>va<span class="_"> </span></span></span>目录下的所有<span class="_ _2"></span><span class="ff3 ls3 ws4">.j<span class="_ _4"></span>ava<span class="_"> </span><span class="ff1 ls0 ws0">文件复制到<span class="_ _a"> </span></span><span class="ls1 ws2">d:<span class="ls0 ws0">\<span class="ls7 ws8">j<span class="_ _4"></span>ad<span class="_"> </span></span><span class="ff1">目录<span class="_ _8"></span>下，并将原</span></span></span></span></span></div><div class="t m2 x3 h3 y71 ff1 fs1 fc1 sc0 ls0 ws0">来文件的扩展名从<span class="ff3 ls3 ws4">.java<span class="_"> </span></span>改为<span class="ff3 lsd ws15">.jad</span>。<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">.................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">79</span></span></span></span></div><div class="t m2 x4 h5 y31 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y72 ff3 fs1 fc1 sc0 ls0 ws0">3<span class="ff1">、编写一个截取<span class="_ _2"></span>字符串的函数，输入为<span class="_ _2"></span>一个字符<span class="_ _2"></span>串和字节数，输出为按<span class="_ _2"></span>字节截取的</span></div><div class="t m2 x3 h3 y73 ff1 fs1 fc1 sc0 ls0 ws0">字符串，但要保证汉字<span class="_ _8"></span>不被截取半个，如<span class="ff4">“</span>我<span class="_ _a"> </span><span class="ff3 ls4 ws5">ABC</span><span class="ff4">”</span>，<span class="ff3">4</span>，应该截取<span class="ff4">“</span>我<span class="_ _a"> </span><span class="ff3 ls4 ws5">AB</span><span class="ff4">”</span><span class="ls3 ws4">，输<span class="_ _4"></span>入</span><span class="ff4">“</span>我</div><div class="t m2 x3 h3 y74 ff3 fs1 fc1 sc0 ls4 ws5">ABC<span class="_ _0"> </span><span class="ff1 ls0 ws0">汉<span class="_ _0"> </span></span><span class="ls9 wsa">DEF<span class="ff4 ls0 ws0">”<span class="ff1">，<span class="ff3">6</span><span class="ls3 ws4">，应该输<span class="_ _4"></span>出</span></span>“<span class="ff1">我<span class="_ _0"> </span></span></span></span>ABC<span class="ff4 ls0 ws0">”<span class="ff1">，而不是</span>“<span class="ff1">我<span class="_ _a"> </span></span></span>ABC+<span class="ff1 ls0 ws0">汉的半个<span class="ff4">”</span>。<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">....................<span class="ls0 ws0"> <span class="ls2 ws3">82</span></span></span></span></span></div><div class="t m2 x4 h5 y75 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y76 ff3 fs1 fc1 sc0 ls0 ws0">4<span class="ff1">、有一个字符串<span class="_ _2"></span>，其中包含中文字符、<span class="_ _2"></span>英文字符<span class="_ _2"></span>和数字字符，请统计和<span class="_ _2"></span>打印出各个</span></div><div class="t m2 x3 h3 y77 ff1 fs1 fc1 sc0 ls0 ws0">字符的个数。<span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">.....................................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">83</span></span></span></span></div><div class="t m2 x4 h5 y78 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y79 ff3 fs1 fc1 sc0 ls0 ws0">5<span class="ff1">、说明生活中遇<span class="_ _2"></span>到的二叉树，用<span class="_ _a"> </span><span class="ff3 ls3 ws4">j<span class="_ _4"></span>ava<span class="_"> </span><span class="ff1">实现二叉树<span class="_ _4"></span></span></span><span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">......................................................<span class="ls0 ws0"> <span class="ls2 ws3">84</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y7a ff3 fs1 fc1 sc0 ls0 ws0">6<span class="ff1">、<span class="_ _5"></span>从类似如下的文本文件中读取出所有<span class="_ _8"></span>的姓名，<span class="_ _3"></span>并打印出<span class="_ _2"></span>重复的姓名和重<span class="_ _2"></span>复的次数，</span></div><div class="t m2 x3 h3 y7b ff1 fs1 fc1 sc0 ls0 ws0">并按重复次数排序：<span class="_ _8"></span><span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">.........................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">91</span></span></span></span></div><div class="t m2 x4 h5 y7c ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y7d ff3 fs1 fc1 sc0 ls0 ws0">7<span class="ff1">、写一个<span class="_ _0"> </span></span><span class="ls9 wsa">Singleton<span class="_"> </span><span class="ff1 ls3 ws4">出来。</span></span><span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">............................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">96</span><span class="fs2"> </span></span></span></span></div><div class="t m2 x3 h3 y7e ff3 fs1 fc1 sc0 ls0 ws0">8<span class="ff1">、递归算法题<span class="_ _a"> </span></span>1<span class="ff4"> <span class="_ _7"></span><span class="ls1 ws2">................................................................................................................<span class="ls0 ws0"> <span class="ls2 ws3">99</span><span class="fs2"> </span></span></span></span></div><div class="t m2 x3 h3 y7f ff3 fs1 fc1 sc0 ls0 ws0">9<span class="ff1">、递归算法题<span class="_ _a"> </span></span>2<span class="ff4"> <span class="_ _7"></span><span class="ls1 ws2">..............................................................................................................<span class="ls0 ws0"> <span class="lse ws1">1<span class="_ _4"></span>00</span><span class="fs2"> </span></span></span></span></div><div class="t m2 x3 h3 y80 ff3 fs1 fc1 sc0 ls1 ws2">10<span class="ff1 ls0 ws0">、排序都有哪几种方法<span class="_ _8"></span>？请列举。用<span class="_ _0"> </span><span class="ff3 ls4 ws5">JAVA<span class="_"> </span></span>实现<span class="_ _2"></span>一个快速排序。<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">.......................<span class="ls0 ws0"> <span class="lse ws1">100</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y81 ff3 fs1 fc1 sc0 ls1 ws2">11<span class="ff1 ls0 ws0">、有数组<span class="_ _0"> </span></span><span class="ls7 ws8">a[n]<span class="_ _4"></span><span class="ff1 ls0 ws0">，用<span class="_ _0"> </span></span><span class="ls3 ws4">ja<span class="_ _4"></span>va<span class="_"> </span><span class="ff1 ls0 ws0">代码将数<span class="_ _8"></span>组元素顺序颠倒<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">..................................................<span class="ls0 ws0"> <span class="lse ws1">102</span><span class="fs2"> </span></span></span></span></span></span></span></div><div class="t m2 x3 h3 y82 ff3 fs1 fc1 sc0 ls1 ws2">12<span class="ff1 ls0 ws0">．<span class="_ _8"></span>金额转换，阿<span class="_ _2"></span>拉伯数字的金额转换成<span class="_ _8"></span>中国传统的形式如：<span class="_ _8"></span>（￥<span class="ff3 ls1 ws2">1011</span><span class="lsf ws16">）－</span><span class="ff3">></span>（一千</span></div><div class="t m2 x3 h3 y83 ff1 fs1 fc1 sc0 ls0 ws0">零一拾一元整）输出。<span class="_ _8"></span><span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">...................................................................................................<span class="ls0 ws0"> <span class="lse ws1">103</span></span></span></span></div><div class="t m2 x4 h5 y84 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x2 h3 y85 ff1 fs1 fc1 sc0 ls0 ws0">三<span class="ff3 ls1 ws1">. html&JavaScript&ajax<span class="_ _a"> </span></span>部分<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">.........................................................................................<span class="ls0 ws0"> <span class="lse ws1">104</span><span class="fs2"> </span></span></span></span></div><div class="t m2 x3 h3 y86 ff3 fs1 fc1 sc0 ls1 ws2">1.<span class="_ _b"> </span><span class="ff1 ls0 ws0">判断第二个日期比<span class="_ _8"></span>第一个日期大<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">..............................................................................<span class="ls0 ws0"> <span class="lse ws1">104</span></span></span></span></span></div><div class="t m2 x3 h3 y87 ff3 fs1 fc1 sc0 ls1 ws2">2.<span class="_ _b"> </span><span class="ff1 ls0 ws0">用<span class="_ _a"> </span></span>table<span class="_"> </span><span class="ff1 ls0 ws0">显示<span class="_ _a"> </span><span class="ff3">n<span class="_"> </span></span>条记录<span class="_ _8"></span>，每<span class="_ _0"> </span><span class="ff3">3<span class="_"> </span></span>行换<span class="_ _2"></span>一次颜色，即<span class="_ _a"> </span><span class="ff3">1</span>，<span class="ff3">2</span>，<span class="ff3">3<span class="_ _a"> </span></span>用红色字体，<span class="ff3">4</span>，<span class="ff3">5</span>，<span class="ff3">6</span></span></div><div class="t m2 x3 h3 y88 ff1 fs1 fc1 sc0 ls0 ws0">用绿色字体，<span class="ff3">7</span>，<span class="ff3">8<span class="_ _2"></span><span class="ff1">，<span class="ff3">9<span class="_ _0"> </span></span>用红颜色字体。<span class="_ _8"></span><span class="ff4"> <span class="_ _4"></span><span class="ls1 ws2">.......................................................................</span> <span class="lse ws1">106</span></span></span></span></div><div class="t m2 x4 h5 y89 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y8a ff3 fs1 fc1 sc0 ls0 ws0">3<span class="ff1">、<span class="_ _1"></span><span class="ff3 lsc ws10">H<span class="_ _4"></span>T<span class="_ _4"></span>ML<span class="_"> </span><span class="ff1 ls0 ws0">的<span class="ff3"> <span class="_ _a"> </span><span class="ls7 ws8">for<span class="_ _4"></span>m<span class="_"> </span></span></span>提交<span class="_ _8"></span>之前如何验证数值文本框<span class="_ _2"></span>的内容全部为数字<span class="ff3">?</span>否则<span class="_ _8"></span>的话提示用</span></span></span></div><div class="t m2 x3 h3 y8b ff1 fs1 fc1 sc0 ls0 ws0">户并终止提交<span class="ff3">?<span class="_ _2"></span><span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">.................................................................................................................<span class="ls0 ws0"> <span class="lse ws1">107</span></span></span></span></span></div><div class="t m2 x4 h5 y8c ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 y8d ff3 fs1 fc1 sc0 ls0 ws0">4<span class="ff1">、请写出用于校<span class="_ _2"></span>验<span class="_ _0"> </span><span class="ff3 ls5 ws6">HT<span class="_ _4"></span>ML<span class="_"> </span></span>文本框中输入的<span class="_ _2"></span>内容全部为数字的<span class="_ _a"> </span><span class="ff3 ls1 ws2">javascript<span class="_"> </span></span><span class="ls3 ws4">代码</span><span class="ff4"> <span class="_ _2"></span><span class="ls1 ws2">.....<span class="ls0 ws0"> <span class="lse ws1">107</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y8e ff3 fs1 fc1 sc0 ls0 ws0">5<span class="ff1">、说说你用过那<span class="_ _2"></span>些<span class="_ _0"> </span><span class="ff3 ls1 ws2">ajax<span class="_ _a"> </span></span>技术和框架，说说它们的<span class="_ _2"></span>区别<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">............................................<span class="ls0 ws0"> <span class="lse ws1">108</span><span class="fs2"> </span></span></span></span></span></div><div class="c x5 y22 w2 h7"><div class="t m2 x0 h8 y23 ff5 fs3 fc1 sc0 ls0 ws0">牛客网-程序员笔试面试题库，程序员求职备考网站 <span class="_ _7"></span>http://www.nowcoder.com</div></div><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div 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<div id="pf5" class="pf w0 h0" data-page-no="5"><div class="pc pc5 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://csdnimg.cn/release/download_crawler_static/10022184/bg5.jpg"><div class="t m2 x2 h3 y24 ff1 fs1 fc1 sc0 ls0 ws0">四<span class="ff3 ls1 ws3">. Java web<span class="_ _0"> </span></span>部分<span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">...............................................................................................................<span class="ls0 ws0"> <span class="lse ws1">108</span><span class="fs2"> </span></span></span></span></div><div class="t m2 x3 h3 y4c ff3 fs1 fc1 sc0 ls0 ws0">1<span class="ff1">、</span><span class="ls7 ws8">Tom<span class="_ _4"></span>c<span class="_ _4"></span>at<span class="_"> </span></span><span class="ff1">的优<span class="_ _2"></span>化经验<span class="ff4"> <span class="ls1 ws2">..................................................................................................</span> <span class="lse ws1">108</span><span class="fs2"> </span></span></span></div><div class="t m2 x3 h3 y8f ff3 fs1 fc1 sc0 ls0 ws0">2<span class="ff1">、</span><span class="ls9 wsa">HTTP<span class="_"> </span><span class="ff1 ls3 ws4">请求的<span class="_ _0"> </span></span><span class="lsa wse">GET<span class="_"> </span></span></span><span class="ff1">与<span class="_ _0"> </span></span><span class="lsa wse">PO<span class="_ _4"></span>ST<span class="_"> </span><span class="ff1 ls3 ws4">方式的<span class="_ _4"></span>区别</span></span><span class="ff4"> <span class="ls1 ws2">..............................................................</span> <span class="lse ws1">108</span><span class="fs2"> </span></span></div><div class="t m2 x3 h3 y90 ff3 fs1 fc1 sc0 ls0 ws0">3<span class="ff1">、解释一下什么<span class="_ _2"></span>是<span class="_ _0"> </span><span class="ff3 ls1 ws2">servlet;</span><span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">...........................................................................................<span class="ls0 ws0"> <span class="lse ws1">108</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y91 ff3 fs1 fc1 sc0 ls0 ws0">4<span class="ff1">、说一说<span class="_ _0"> </span></span><span class="ls7 ws8">Ser<span class="_ _4"></span>vlet<span class="_"> </span></span><span class="ff1">的生命周期</span>?<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">....................................................................................<span class="ls0 ws0"> <span class="_ _2"></span><span class="lse ws1">109<span class="fs2 ls0 ws0"> </span></span></span></span></span></div><div class="t m2 x3 h3 y92 ff3 fs1 fc1 sc0 ls0 ws0">5<span class="ff1">、</span><span class="ls1 ws2">Servlet<span class="_ _0"> </span></span><span class="ff1">的基本架构<span class="_ _2"></span><span class="ff4"> <span class="ls1 ws2">...................................................................................................</span> 1<span class="lse ws1">09</span><span class="fs2"> </span></span></span></div><div class="t m2 x3 h3 y93 ff3 fs1 fc1 sc0 ls0 ws0">6<span class="ff1">、</span><span class="ls4 ws17">SERVLET API<span class="_ _0"> </span></span><span class="ff1">中<span class="_ _0"> </span></span><span class="ls1 ws2">forward()</span><span class="ff1">与<span class="_ _0"> </span></span><span class="ls1 ws2">redirect()<span class="ff1 ls3 ws4">的区<span class="_ _4"></span>别？</span></span><span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">................................................<span class="ls0 ws0"> <span class="lse ws1">109</span><span class="fs2"> </span></span></span></span></div><div class="t m2 x3 h3 y94 ff3 fs1 fc1 sc0 ls0 ws0">7<span class="ff1">、什么情况下调<span class="_ _2"></span>用<span class="_ _0"> </span><span class="ff3 ls1 ws2">doGet(</span><span class="ff3">)</span>和<span class="_ _0"> </span><span class="ff3 ls1 ws2">doPost()</span>？<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">..................................................................<span class="ls0 ws0"> <span class="lse ws1">109</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y95 ff3 fs1 fc1 sc0 ls0 ws0">8<span class="ff1">、</span><span class="ls1 ws2">Request<span class="_ _0"> </span></span><span class="ff1">对象的主要<span class="_ _2"></span>方法：<span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">.....................................................................................<span class="ls0 ws0"> <span class="lse ws1">110</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y96 ff3 fs1 fc1 sc0 ls0 ws0">9<span class="ff1">、</span><span class="ls1 ws2">forward<span class="_ _0"> </span></span><span class="ff1">和<span class="_ _a"> </span></span><span class="ls1 ws2">r<span class="_ _4"></span>edirect<span class="_ _0"> </span><span class="ff1 ls3 ws4">的区别</span></span><span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">.......................................................................................<span class="ls0 ws0"> <span class="lse ws1">110</span><span class="fs2"> </span></span></span></span></div><div class="t m2 x3 h3 y97 ff3 fs1 fc1 sc0 ls1 ws2">10<span class="ff1 ls0 ws0">、</span>request.getAttribute()<span class="ff1 ls0 ws0">和<span class="ff3"> <span class="_ _a"> </span></span></span>request.getParameter(<span class="_ _4"></span>)<span class="ff1 ls0 ws0">有何区别<span class="ff3">?<span class="_ _8"></span><span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">............................<span class="ls0 ws0"> <span class="lse ws1">111</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y98 ff3 fs1 fc1 sc0 ls1 ws3">11.<span class="_"> </span>jsp<span class="_"> </span><span class="ff1 ls0 ws0">有哪些内<span class="_ _2"></span>置对象<span class="ff3">?</span>作用分别是什么<span class="ff3">?<span class="_ _8"></span><span class="ff1">分别有什么方法？<span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">..................................<span class="ls0 ws0"> <span class="lse ws1">1<span class="_ _4"></span>11</span></span></span></span></span></span></span></div><div class="t m2 x3 h3 y99 ff3 fs1 fc1 sc0 ls1 ws3">12.<span class="_"> </span>jsp<span class="_"> </span><span class="ff1 ls3 ws4">有哪些动作<span class="_ _4"></span></span><span class="ls0 ws0">?<span class="ff1">作用分别是什么</span>?<span class="_ _8"></span><span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">..........................................................................<span class="ls0 ws0"> <span class="lse ws1">1<span class="_ _4"></span>12</span></span></span></span></span></div><div class="t m2 x3 h3 y9a ff3 fs1 fc1 sc0 ls1 ws2">13<span class="ff1 ls0 ws0">、</span><span class="ls4 ws5">JSP<span class="_ _0"> </span><span class="ff1 ls0 ws0">的常用指令<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">......................................................................................................<span class="ls0 ws0"> <span class="lse ws1">112</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y9b ff3 fs1 fc1 sc0 ls1 ws1">14.<span class="_"> </span>JSP<span class="_ _0"> </span><span class="ff1 ls3 ws4">中动态<span class="_ _0"> </span></span><span class="ls9 wsa">I<span class="_ _4"></span>NCLUDE<span class="_ _0"> </span><span class="ff1 ls0 ws0">与静态<span class="_ _a"> </span></span>I<span class="_ _4"></span>NCLUDE<span class="_"> </span><span class="ff1 ls0 ws0">的区别？<span class="_ _8"></span><span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">.............................................<span class="ls0 ws0"> <span class="lse ws1">112</span></span></span></span></span></span></div><div class="t m2 x3 h3 y9c ff3 fs1 fc1 sc0 ls1 ws2">15<span class="ff1 ls0 ws0">、两种跳转方式分别是<span class="_ _8"></span>什么<span class="ff3">?</span>有什么区别<span class="ff3">?<span class="ff4"> <span class="_ _8"></span><span class="ls1 ws2">..............................................................<span class="ls0 ws0"> <span class="lse ws1">113</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 y9d ff3 fs1 fc1 sc0 ls1 ws2">16<span class="ff1 ls0 ws0">、页面间对象传递的方<span class="_ _8"></span>法<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">...........................................................................................<span class="ls0 ws0"> <span class="lse ws1">113</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y9e ff3 fs1 fc1 sc0 ls1 ws2">17<span class="ff1 ls0 ws0">、</span><span class="ls4 ws5">JSP<span class="_ _0"> </span><span class="ff1 ls0 ws0">和<span class="_ _0"> </span></span></span>Servlet<span class="_ _0"> </span><span class="ff1 ls0 ws0">有哪些相同点和不同<span class="_ _2"></span>点，他们之间的联<span class="_ _8"></span>系是什么？<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">................<span class="ls0 ws0"> <span class="lse ws1">113</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 y9f ff3 fs1 fc1 sc0 ls1 ws2">18<span class="ff1 ls0 ws0">、</span><span class="lsc ws10">MVC<span class="_"> </span><span class="ff1 ls0 ws0">的各个部分都有那些技术<span class="ls3 ws4">来实现</span><span class="ff3">?</span>如何实现<span class="ff3">?<span class="_ _2"></span><span class="ff4"> <span class="ls1 ws2">............................................</span> <span class="lse ws1">113</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 ya0 ff3 fs1 fc1 sc0 ls1 ws2">19<span class="ff1 ls0 ws0">、我们在<span class="_ _0"> </span></span><span class="ls5 ws6">web<span class="_"> </span><span class="ff1 ls0 ws0">应用开发过程中经常遇<span class="_ _8"></span>到输出某种编码的字符，<span class="_ _2"></span>如<span class="_ _0"> </span><span class="ff3 ls1 ws2">iso8859</span><span class="ff3">-1<span class="_ _0"> </span></span>等，</span></span></div><div class="t m2 x3 h3 ya1 ff1 fs1 fc1 sc0 ls0 ws0">如何输出一个某种编码<span class="_ _8"></span>的字符串？<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">...............................................................................<span class="ls0 ws0"> <span class="lse ws1">113</span></span></span></span></div><div class="t m2 x4 h5 ya2 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x3 h3 ya3 ff3 fs1 fc1 sc0 ls1 ws2">20<span class="ff1 ls0 ws0">、<span class="_ _1"></span>现在输入<span class="_ _0"> </span><span class="ff3">n<span class="_ _0"> </span></span>个数字，<span class="_ _1"></span>以逗号，<span class="_ _1"></span>分开；<span class="_ _1"></span>然后可选择升或者<span class="_ _8"></span>降序排序；<span class="_ _1"></span>按提交键就在</span></div><div class="t m2 x3 h3 ya4 ff1 fs1 fc1 sc0 ls0 ws0">另一页面显示按什么排<span class="_ _8"></span>序，结果为，提供<span class="_ _a"> </span><span class="ff3 ls7 ws8">r<span class="_ _4"></span>es<span class="_ _4"></span>et</span><span class="ff4"> <span class="ls1 ws2">.........................................................</span> <span class="lse ws1">114</span></span></div><div class="t m2 x4 h5 ya5 ff4 fs2 fc1 sc0 ls0 ws0"> </div><div class="t m2 x2 h3 ya6 ff1 fs1 fc1 sc0 ls0 ws0">五<span class="ff3">.</span>数据库部分<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">......................................................................................................................<span class="ls0 ws0"> <span class="lse ws1">114</span><span class="fs2"> </span></span></span></span></div><div class="t m2 x3 h3 ya7 ff3 fs1 fc1 sc0 ls0 ws0">1<span class="ff1">、用两种方式根<span class="_ _2"></span>据部门号从高到低，工<span class="_ _2"></span>资从低到<span class="_ _2"></span>高列出每个员工的信息<span class="_ _2"></span>。<span class="ff4"> <span class="_ _1"></span><span class="ls1 ws2">.........<span class="ls0 ws0"> <span class="lse ws1">1<span class="_ _4"></span>14</span><span class="fs2"> </span></span></span></span></span></div><div class="t m2 x3 h3 ya8 ff3 fs1 fc1 sc0 ls0 ws0">2<span class="ff1">、列出各个部门<span class="_ _2"></span>中工资高于本部门的平<span class="_ _2"></span>均工资的<span class="_ _2"></span>员工数和部门号，并按<span class="_ _2"></span>部门号排序</span></div><div class="t m2 x3 h4 ya9 ff4 fs1 fc1 sc0 ls0 ws0"> <span class="_ _3"></span><span class="ls1 ws2">...........................................................................................................................................<span class="ls0 ws0"> <span class="lse ws1">114</span><span class="fs2"> </span></span></span></div><div class="t m2 x3 h3 yaa ff3 fs1 fc1 sc0 ls0 ws0">3<span class="ff1">、存储过程与触<span class="_ _2"></span>发器必须讲，经常被面<span class="_ _2"></span>试到<span class="ff3">?<span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">...........................................................<span class="ls0 ws0"> <span class="lse ws1">116</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 yab ff3 fs1 fc1 sc0 ls0 ws0">4<span class="ff1">、数据库三范式<span class="_ _2"></span>是什么<span class="ff3">?<span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">...............................................................................................<span class="ls0 ws0"> <span class="lse ws1">118</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 yac ff3 fs1 fc1 sc0 ls0 ws0">5<span class="ff1">、说出一些数据<span class="_ _2"></span>库优化方面的经验<span class="ff3">?<span class="_ _8"></span><span class="ff4"> <span class="_ _5"></span><span class="ls1 ws2">...........................................................................<span class="ls0 ws0"> <span class="lse ws1">119</span><span class="fs2"> </span></span></span></span></span></span></div><div class="t m2 x3 h3 yad ff3 fs1 fc1 sc0 ls0 ws0">6<span class="ff1">、</span><span class="ls1 ws2">union<span class="_ _0"> </span></span><span class="ff1">和<span class="_ _0"> </span></span><span class="ls1 ws1">union all<span class="_ _a"> </span></span><span class="ff1">有什么不同</span>?<span class="ff4"> <span class="_ _3"></span><span class="ls1 ws2">...............................................................................<span class="ls0 ws0"> <span class="lse ws1">121</span><span class="fs2"> </span></span></span></span></div><div class="t m2 x3 h3 yae ff3 fs1 fc1 sc0 ls1 ws2">7.<span class="ff1 ls0 ws0">分页语句<span class="ff4"> <span class="_ _6"></span><span class="ls1 ws2">........................................................................................................................<span class="ls0 ws0"> <span class="lse ws1">122</span></span></span></span></span></div><div class="c x5 y22 w2 h7"><div class="t m2 x0 h8 y23 ff5 fs3 fc1 sc0 ls0 ws0">牛客网-程序员笔试面试题库，程序员求职备考网站 <span class="_ _7"></span>http://www.nowcoder.com</div></div><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' 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java面试题汇
