chap11

java poi 操作Excel封装，zip，多文件装读取(Java POI operation Excel encapsulation)

Java提供的API类BigDecimal，用来对超过16位有效位的数进行精确的运算。双精度浮点型变量double可以处理16位有效数。在实际应用中，需要对更大或者更小的数进行运算和处理。(BigDecimal Java API classes provided for more than 16 significant bits of the number of precise calculations. Double-precision floating-point variables can handle double the number of 16-bit effective. In practice, the need for a larger or smaller number of computing and processing.)

说明：  美团点评分布式ID生成系统中Leaf-segment数据库方案的实现(US Mission Review Implementation of Leaf-segment Database Scheme in Distributed ID Generation System)

java模拟时钟，可在换数字时钟和模拟时钟之间切换(java analog clock, switch between change digital clock and analog clock)

Azureus_2.3.0.4_source code about bittorrent P2P protocol

本书介绍了java语言的基本特性，包括字符串、选择、小应用程序以及异常等内容。与一般书籍不同的事，本书用大量的示例说明了java语言的语法、特性等，特别适合与刚刚接触java的学生，使其在实战中锻炼java语言的开发技巧。(This book introduces the basic features of java language, including strings, select, small applications, and exceptions and so on. Different things with the general books, book with plenty of examples illustrate the syntax of the java language, characteristics, especially for students and new to java, java training in actual combat to the development of language skills.)

deepstream.io-tools-react: A react mixin that syncs a component s state with deepstream

2.设计一个9x9的棋盘窗口，用黑白相间颜色填充棋盘。棋盘大小为600x600，标题为“棋盘”，窗口大小不可改变。程序文件命名为Exe8_2.java。(2. Design a 9x9 board window, filling the board with black and white colors. Board size is 600x600, titled chessboard , the window size can not be changed. Program file named Exe8_2.java.)

rational software architect activation

手机中利用二维码进行定位.（标记部分） 程序包括两个部分,这部分为标记部分,需两部分配合使用(Project Name:QR_CodeScan_Baoji Description:Mobile phone use qr code to locate (tag))