黑马程序员面试宝典(java).7z_java_其他

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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://static.pudn.com/prod/directory_preview_static/62748e29445c3651d280c728/bg2.jpg"><div class="c x0 yb w2 h0"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0"> 感恩于心，回报于行。 面试宝典系列-Java </div><div class="t m0 x2 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h3 y3 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1 h3 y4 ff3 fs3 fc2 sc0 ls0 ws0">http://www.itheima.com Copyright© 2018 黑马程序员 </div></div><div class="c x3 yc w3 h8"><div class="t m0 x0 h3 yd ff1 fs0 fc0 sc0 ls0 ws0">2 </div></div><div class="c x0 yb w2 h0"><div class="t m0 x1 h4 y6 ff2 fs3 fc0 sc0 ls0 ws0">第一章 内容介绍 ................................................................................................................................................................................. 20 </div><div class="t m0 x1 h4 ye ff2 fs3 fc0 sc0 ls0 ws0">第二章 JavaSE 基础 ........................................................................................................................................................................... 21 </div><div class="t m0 x9 h4 yf ff2 fs3 fc0 sc0 ls0 ws0">一、 Java 面向对象.................................................................................................................................................................... 21 </div><div class="t m0 xa h4 y10 ff1 fs3 fc0 sc0 ls0 ws0">1. 面向对象都有哪些特性以及你对这些特性的理解 ................................................................................................... 21 </div><div class="t m0 xa h4 y11 ff1 fs3 fc0 sc0 ls0 ws0">2. 访问权限修饰符 public、private、protected, 以及不写（默认）时的区别(2017-11-12) ....................... 22 </div><div class="t m0 xa h4 y12 ff1 fs3 fc0 sc0 ls0 ws0">3. 如何理解 clone 对象 .................................................................................................................................................... 22 </div><div class="t m0 x9 h4 y13 ff2 fs3 fc0 sc0 ls0 ws0">二、 JavaSE 语法（2017-11-12-wl） ................................................................................................................................. 27 </div><div class="t m0 xa h4 y14 ff1 fs3 fc0 sc0 ls0 ws0">1. Java 有没有 goto 语句？（2017-11-12-wl） ....................................................................................................... 27 </div><div class="t m0 xa h4 y15 ff1 fs3 fc0 sc0 ls0 ws0">2. & 和 && 的区别（2017-11-12-wl） ................................................................................................................... 27 </div><div class="t m0 xa h4 y16 ff1 fs3 fc0 sc0 ls0 ws0">3. 在 Java 中，如何跳出当前的多重嵌套循环（2017-11-14-wl） ....................................................................... 27 </div><div class="t m0 xa h4 y17 ff1 fs3 fc0 sc0 ls0 ws0">4. 两个对象值相同 (x.equals(y) == true) ，但却可有不同的 hashCode，这句话对不对？（2017-11-14-</div><div class="t m0 xa h4 y18 ff1 fs3 fc0 sc0 ls7 ws0">wl） ....................................................................................................................................................................................... 28 </div><div class="t m0 xa h4 y19 ff1 fs3 fc0 sc0 ls0 ws0">5. 是否可以继承 String （2017-11-14-wl） ............................................................................................................. 28 </div><div class="t m0 xa h4 y1a ff1 fs3 fc0 sc0 ls0 ws0">6. 当一个对象被当作参数传递到一个方法后，此方法可改变这个对象的属性，并可返回变化后的结果，那么</div><div class="t m0 xa h4 y1b ff2 fs3 fc0 sc0 ls0 ws0">这里到底是值传递还是引用传递?（2017-11-14-wl）.............................................................................................. 29 </div><div class="t m0 xa h4 y1c ff1 fs3 fc0 sc0 ls0 ws0">7. 重载（overload）和重写（override）的区别？重载的方法能否根据返回类型进行区分？（2017-11-15-</div><div class="t m0 xa h4 y1d ff1 fs3 fc0 sc0 ls7 ws0">wl） ....................................................................................................................................................................................... 29 </div><div class="t m0 xa h4 y1e ff1 fs3 fc0 sc0 ls0 ws0">8. 为什么函数不能根据返回类型来区分重载？（2017-11-15-wl） ..................................................................... 30 </div><div class="t m0 xa h4 y1f ff1 fs3 fc0 sc0 ls0 ws0">9. char 型变量中能不能存储一个中文汉字，为什么？（2017-11-16-wl） ....................................................... 31 </div><div class="t m0 xa h4 y20 ff1 fs3 fc0 sc0 ls0 ws0">10. 抽象类(abstract class)和接口(interface)有什么异同？（2017-11-16-wl） .............................................. 31 </div><div class="t m0 xa h4 y21 ff1 fs3 fc0 sc0 ls0 ws0">11. 抽象的(abstract)方法是否可同时是静态的(static), 是否可同时是本地方法(native)，是否可同时被</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" 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" 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" 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" 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" 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></div><div class="pi" data-data='{"ctm":[1.611792,0.000000,0.000000,1.611792,0.000000,0.000000]}'></div></div>

<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://static.pudn.com/prod/directory_preview_static/62748e29445c3651d280c728/bg3.jpg"><div class="c x0 yb w2 h0"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0"> 感恩于心，回报于行。 面试宝典系列-Java </div><div class="t m0 x2 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h3 y3 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1 h3 y4 ff3 fs3 fc2 sc0 ls0 ws0">http://www.itheima.com Copyright© 2018 黑马程序员 </div></div><div class="c x3 yc w3 h8"><div class="t m0 x0 h3 yd ff1 fs0 fc0 sc0 ls0 ws0">3 </div></div><div class="c x0 yb w2 h0"><div class="t m0 xa h4 y6 ff1 fs3 fc0 sc0 ls0 ws0">synchronized（2017-11-16-wl） ................................................................................................................................ 32 </div><div class="t m0 xa h4 ye ff1 fs3 fc0 sc0 ls0 ws0">12. 阐述静态变量和实例变量的区别？（2017-11-16-wl） ................................................................................... 32 </div><div class="t m0 xa h4 yf ff1 fs3 fc0 sc0 ls0 ws0">13. ==和 equals 的区别？（2017-11-22-wzz） ...................................................................................................... 33 </div><div class="t m0 xa h4 y10 ff1 fs3 fc0 sc0 ls3 ws0">14. break 和 continue 的区别？（2017-11-23-wzz） ........................................................................................... 33 </div><div class="t m0 xa h4 y11 ff1 fs3 fc0 sc0 ls0 ws0">15. String s = "Hello";s = s + " world!";这两行代码执行后，原始的 String 对象中的内容到底变了没有？</div><div class="t m0 xa h4 y12 ff2 fs3 fc0 sc0 ls0 ws0">（2017-12-1-lyq） ........................................................................................................................................................... 33 </div><div class="t m0 x9 h4 y13 ff2 fs3 fc0 sc0 ls0 ws0">三、 Java 中的多态.................................................................................................................................................................... 35 </div><div class="t m0 xa h4 y14 ff1 fs3 fc0 sc0 ls0 ws0">1. Java 中实现多态的机制是什么？ ................................................................................................................................ 35 </div><div class="t m0 x9 h4 y15 ff2 fs3 fc0 sc0 ls0 ws0">四、 Java 的异常处理 ............................................................................................................................................................... 35 </div><div class="t m0 xa h4 y16 ff1 fs3 fc0 sc0 ls0 ws0">1. Java 中异常分为哪些种类 ............................................................................................................................................ 35 </div><div class="t m0 xa h4 y17 ff1 fs3 fc0 sc0 ls0 ws0">2. 调用下面的方法，得到的返回值是什么？ ............................................................................................................... 35 </div><div class="t m0 xa h4 y18 ff1 fs3 fc0 sc0 ls0 ws0">3. error 和 exception 的区别？（2017-2-23） ......................................................................................................... 36 </div><div class="t m0 xa h4 y19 ff1 fs3 fc0 sc0 ls0 ws0">4. java 异常处理机制（2017-2-23） ............................................................................................................................ 37 </div><div class="t m0 xa h4 y1a ff1 fs3 fc0 sc0 ls0 ws0">5. 请写出你最常见的 5 个 RuntimeException（2017-11-22-wzz） .................................................................. 37 </div><div class="t m0 xa h4 y1b ff1 fs3 fc0 sc0 ls0 ws0">6. throw 和 throws 的区别（2017-11-22-wzz） ..................................................................................................... 38 </div><div class="t m0 xa h4 y1c ff1 fs3 fc0 sc0 ls0 ws0">7. final、finally、finalize 的区别？（2017-11-23-wzz） ...................................................................................... 38 </div><div class="t m0 x9 h4 y1d ff2 fs3 fc0 sc0 ls0 ws0">五、 JavaSE 常用 API ............................................................................................................................................................... 39 </div><div class="t m0 xa h4 y1e ff1 fs3 fc0 sc0 ls0 ws0">1. Math.round(11.5)等于多少？Math.round(- 11.5) 又等于多少?(2017-11-14-wl) ..................................... 39 </div><div class="t m0 xa h4 y1f ff1 fs3 fc0 sc0 ls0 ws0">2. switch 是否能作用在 byte 上，是否能作用在 long 上，是否能作用在 String 上?(2017-11-14-wl) ........ 39 </div><div class="t m0 xa h4 y20 ff1 fs3 fc0 sc0 ls0 ws0">3. 数组有没有 length() 方法？String 有没有 length() 方法？(2017-11-14-wl) ............................................. 39 </div><div class="t m0 xa h4 y21 ff1 fs3 fc0 sc0 ls0 ws0">4. String 、StringBuilder 、StringBuffer 的区别？(2017-11-14-wl) ............................................................... 39 </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" 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" 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" 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" 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" 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></div><div class="pi" data-data='{"ctm":[1.611792,0.000000,0.000000,1.611792,0.000000,0.000000]}'></div></div>

<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://static.pudn.com/prod/directory_preview_static/62748e29445c3651d280c728/bg4.jpg"><div class="c x0 yb w2 h0"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0"> 感恩于心，回报于行。 面试宝典系列-Java </div><div class="t m0 x2 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h3 y3 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1 h3 y4 ff3 fs3 fc2 sc0 ls0 ws0">http://www.itheima.com Copyright© 2018 黑马程序员 </div></div><div class="c x3 yc w3 h8"><div class="t m0 x0 h3 yd ff1 fs0 fc0 sc0 ls0 ws0">4 </div></div><div class="c x0 yb w2 h0"><div class="t m0 xa h4 y6 ff1 fs3 fc0 sc0 ls0 ws0">5. 什么情况下用“+”运算符进行字符串连接比调用 StringBuffer/StringBuilder 对象的 append 方法连接</div><div class="t m0 xa h4 ye ff2 fs3 fc0 sc0 ls0 ws0">字符串性能更好？(2017-11-14-wl) .............................................................................................................................. 40 </div><div class="t m0 xa h4 yf ff1 fs3 fc0 sc0 ls0 ws0">6. 请说出下面程序的输出(2017-11-14-wl) ................................................................................................................ 47 </div><div class="t m0 xa h4 y10 ff1 fs3 fc0 sc0 ls0 ws0">7. Java 中的日期和时间(2017-11-19-wl) .................................................................................................................... 48 </div><div class="t m0 x9 h4 y11 ff2 fs3 fc0 sc0 ls0 ws0">六、 Java 的数据类型 ............................................................................................................................................................... 70 </div><div class="t m0 xa h4 y12 ff1 fs3 fc0 sc0 ls0 ws0">1. Java 的基本数据类型都有哪些各占几个字节 ........................................................................................................... 70 </div><div class="t m0 xa h4 y13 ff1 fs3 fc0 sc0 ls0 ws0">2. String 是基本数据类型吗？（2017-11-12-wl） ................................................................................................... 71 </div><div class="t m0 xa h4 y14 ff1 fs3 fc0 sc0 ls0 ws0">3. short s1 = 1; s1 = s1 + 1; 有错吗?short s1 = 1; s1 += 1 有错吗;（2017-11-12-wl） ........................... 71 </div><div class="t m0 xa h4 y15 ff1 fs3 fc0 sc0 ls0 ws0">4. int 和 和 Integer 有什么区别？(2017-11-12-wl) ............................................................................................... 71 </div><div class="t m0 xa h4 y16 ff1 fs3 fc0 sc0 ls0 ws0">5. 下面 Integer 类型的数值比较输出的结果为？(2017-11-12-wl) ....................................................................... 72 </div><div class="t m0 xa h4 y17 ff1 fs3 fc0 sc0 ls0 ws0">6. String 类常用方法（2017-11-15-lyq） .................................................................................................................. 74 </div><div class="t m0 xa h4 y18 ff1 fs3 fc0 sc0 ls0 ws0">7. String、StringBuffer、StringBuilder 的区别？（2017-11-23-wzz） ........................................................... 74 </div><div class="t m0 xa h4 y19 ff1 fs3 fc0 sc0 ls0 ws0">8. 数据类型之间的转换（2017-11-23-wzz） ............................................................................................................ 75 </div><div class="t m0 x9 h4 y1a ff2 fs3 fc0 sc0 ls0 ws0">七、 Java 的 IO .......................................................................................................................................................................... 75 </div><div class="t m0 xa h4 y1b ff1 fs3 fc0 sc0 ls0 ws0">1. Java 中有几种类型的流（2017-11-23-wzz） ........................................................................................................ 75 </div><div class="t m0 xa h4 y1c ff1 fs3 fc0 sc0 ls0 ws0">2. 字节流如何转为字符流 ................................................................................................................................................ 76 </div><div class="t m0 xa h4 y1d ff1 fs3 fc0 sc0 ls0 ws0">3. 如何将一个 java 对象序列化到文件里 ...................................................................................................................... 76 </div><div class="t m0 xa h4 y1e ff1 fs3 fc0 sc0 ls0 ws0">4. 字节流和字符流的区别（2017-11-23-wzz） ........................................................................................................ 77 </div><div class="t m0 xa h4 y1f ff1 fs3 fc0 sc0 ls0 ws0">5. 如何实现对象克隆？(2017-11-12-wl) .................................................................................................................... 77 </div><div class="t m0 xa h4 y20 ff1 fs3 fc0 sc0 ls0 ws0">6. 什么是 java 序列化，如何实现 java 序列化？(2017-12-7-lyq) ........................................................................ 80 </div><div class="t m0 x9 h4 y21 ff2 fs3 fc0 sc0 ls0 ws0">八、 Java 的集合 ........................................................................................................................................................................ 81 </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" 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" 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" 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" 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" 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></div><div class="pi" data-data='{"ctm":[1.611792,0.000000,0.000000,1.611792,0.000000,0.000000]}'></div></div>

<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://static.pudn.com/prod/directory_preview_static/62748e29445c3651d280c728/bg5.jpg"><div class="c x0 yb w2 h0"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0"> 感恩于心，回报于行。 面试宝典系列-Java </div><div class="t m0 x2 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h3 y3 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1 h3 y4 ff3 fs3 fc2 sc0 ls0 ws0">http://www.itheima.com Copyright© 2018 黑马程序员 </div></div><div class="c x3 yc w3 h8"><div class="t m0 x0 h3 yd ff1 fs0 fc0 sc0 ls0 ws0">5 </div></div><div class="c x0 yb w2 h0"><div class="t m0 xa h4 y6 ff1 fs3 fc0 sc0 ls0 ws0">1. HashMap 排序题，上机题。(本人主要靠这道题入职的第一家公司) ................................................................ 81 </div><div class="t m0 xa h4 ye ff1 fs3 fc0 sc0 ls0 ws0">2. 集合的安全性问题 ......................................................................................................................................................... 83 </div><div class="t m0 xa h4 yf ff1 fs3 fc0 sc0 ls0 ws0">3. ArrayList 内部用什么实现的？（2015-11-24）.................................................................................................... 83 </div><div class="t m0 xa h4 y10 ff1 fs3 fc0 sc0 ls0 ws0">4. 并发集合和普通集合如何区别？（2015-11-24） ................................................................................................ 89 </div><div class="t m0 xa h4 y11 ff1 fs3 fc0 sc0 ls0 ws0">5. List 的三个子类的特点（2017-2-23） ..................................................................................................................... 91 </div><div class="t m0 xa h4 y12 ff1 fs3 fc0 sc0 ls0 ws0">6. List 和 Map、Set 的区别（2017-11-22-wzz） .................................................................................................... 91 </div><div class="t m0 xa h4 y13 ff1 fs3 fc0 sc0 ls0 ws0">7. HashMap 和 HashTable 有什么区别?（2017-2-23） ....................................................................................... 92 </div><div class="t m0 xa h4 y14 ff1 fs3 fc0 sc0 ls0 ws0">8. 数组和链表分别比较适合用于什么场景，为什么？（2017-2-23） ................................................................. 93 </div><div class="t m0 xa h4 y15 ff1 fs3 fc0 sc0 ls0 ws0">9. Java 中 ArrayList 和 Linkedlist 区别？（2017-2-23） ....................................................................................... 96 </div><div class="t m0 xa h4 y16 ff1 fs3 fc0 sc0 ls0 ws0">10. List a=new ArrayList()和 ArrayList a =new ArrayList()的区别？（2017-2-24） .................................... 97 </div><div class="t m0 xa h4 y17 ff1 fs3 fc0 sc0 ls0 ws0">11. 要对集合更新操作时，ArrayList 和 LinkedList 哪个更适合？(2017-2-24) ................................................. 97 </div><div class="t m0 xa h4 y18 ff1 fs3 fc0 sc0 ls0 ws0">12. 请用两个队列模拟堆栈结构（2017-2-24） ...................................................................................................... 101 </div><div class="t m0 xa h4 y19 ff1 fs3 fc0 sc0 ls0 ws0">13. Collection 和 Map 的集成体系（2017-11-14-lyq） ..................................................................................... 102 </div><div class="t m0 xa h4 y1a ff1 fs3 fc0 sc0 ls0 ws0">14. Map 中的 key 和 value 可以为 null 么？（2017-11-21-gxb）................................................................... 103 </div><div class="t m0 x9 h4 y1b ff2 fs3 fc0 sc0 ls0 ws0">九、 Java 的多线程和并发库 ................................................................................................................................................ 104 </div><div class="t m0 xa h4 y1c ff2 fs3 fc0 sc0 ls0 ws0">（一）多线程基础知识--传统线程机制的回顾（2017-12-11-wl） .................................................................... 104 </div><div class="t m0 xa h4 y1d ff2 fs3 fc0 sc0 ls0 ws0">（二）多线程基础知识--线程并发库（2017-12-11-wl） ..................................................................................... 118 </div><div class="t m0 xa h4 y1e ff2 fs3 fc0 sc0 ls0 ws0">（三）多线程面试题 ....................................................................................................................................................... 246 </div><div class="t m0 x9 h4 y1f ff2 fs3 fc0 sc0 ls0 ws0">十、 Java 内部类 ..................................................................................................................................................................... 272 </div><div class="t m0 xa h4 y20 ff1 fs3 fc0 sc0 ls0 ws0">1. 静态嵌套类 (Static Nested Class) 和内部类(Inner Class)的不同？（2017-11-16-wl） ...................... 272 </div><div class="t m0 xa h4 y21 ff1 fs3 fc0 sc0 ls0 ws0">2. 下面的代码哪些地方会产生编译错误？（2017-11-16-wl） ........................................................................... 272 </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" 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" 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" 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" 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" 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></div><div class="pi" data-data='{"ctm":[1.611792,0.000000,0.000000,1.611792,0.000000,0.000000]}'></div></div>