C4.5

检测用户是否存在，借书还书功能，新书推荐，书籍查找等多项功能，页面优化级别A(this is a good Library System plase know from Chinese detail)

Test String.prototype.replace.

C++程序设计源代码例(C programming source code cases)

说明：  飞机大战 首先对这个游戏分析,在屏幕上的物体都是飞行物,我们可以把建一个类,让其他飞行物继承这个类.游戏中应有英雄机(也就是自己控制的飞机)、敌人。而敌人应该分为打死给分的飞机（就是普通飞机），另一种就是打死有奖励的敌人。他们都应该是飞行物的子类，我们也可以为普通飞机和给奖励的敌人设一个接口让他们去实现接口，这样有利于以后的扩展，我在这里给的简化版的飞机大战，主要是为了让大家了解面向对象。(First of all, analyze the game. The objects on the screen are flying objects. We can build a class and let other flying objects inherit this class. There should be hero planes (i.e., planes controlled by ourselves) and enemies in the game. And the enemy should be divided into killing the aircraft (that is, ordinary aircraft), the other is to kill the enemy with reward. They should be subclasses of flying objects. We can also set an interface for ordinary aircraft and reward enemies to implement the interface, which is conducive to future expansion. The simplified version of aircraft War I gave here is mainly to let you understand object-oriented.)

九宫图排序，实现记录功能,中间为空，沿四周分布(Figure Jiugong sort of record function, the middle is empty, surrounded by distribution along the)

javabean开发的jsp上传文件，支持多文件上传(javabean development jsp upload documents to support more file uploads)

Java 操作串口 的开发实例，非常实用，方法已经封装好了，直接调用即可。(java )

说明：  Chapter 1 codes ... this is fun

用java3d写得一个小程序，有缩放、旋转、平移等功能(A small program written by java3d, zoom, rotate, pan, etc.)

通过GPS获取当前位置坐标的简单DEMO(Get GPS coordinates simple DEMO)