说明：  JAVA数据结构与算法(第二版),国外经典计算机书籍,提供用JAVA语言说明的重要概念,避免C++语言的复杂性,以便集中论述数据结构和算法
(JAVA data structures and algorithms (second edition), foreign classics of computer books, using JAVA language provides an important concept, to avoid C++ Linguistic complexity, in order to focus on data structures and algorithms)