用jdom解析xml , 需要用到jar包jdom.jar

Swing Test程序， 可以设置JFrame背景图-Swing Test procedures can set class background map

jsp网页里的验证码实现(产生四位的随机字符,由0-9,a-z,A-Z构成.并把最终字符串放到session中保存以让后续页面验证真伪) -jsp pages in the Verification Code realize (4 random characters generated by the 0-9, az, AZ pose. and ultimately save the string into session in order to allow follow-up to verify the authenticity of the page)

一个聊天室小程序，很好的，简单实用,很有代表性，下来-a small chat room procedures, very good, simple and practical, very representative, look down

java 聊天程序（c/s)适合初学者使用-java chat program (c/s) suitable for beginners to use

rtp接收端，未测试书上抄的，因为急用源码所以上传要5个，这个只供学习好了。-rtp receiver, did not test copy of the book, because there upload source 194,900 to five, only to learn it.

Simple class to read file

基于密度的聚类的实现，用JSP实现的，界面友好-Density-based clustering to achieve, using JSP to achieve, user-friendly

回文数的判断，输入一个字符串，不考虑标点符号和空格，只考虑字母或数字，判断它是否回文数-palindrome number of judgment, the importation of a string of not punctuation and spaces, only letters or numbers, to judge whether it palindrome number

制图软件，有撤销重做等功能-mapping software, revoke Redo function