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说明：  java 中的多线程程序实例,包括：线程的创建方式、线程的生命周期、线程的方法（启动、挂起、唤醒、优先级等）(The multi-threaded java program example)

this is a java based FIR application where police register FIR .

一个用java做的时钟,很漂亮(a java do with the clock, a very nice)

说明：  The C Programming Language若干行代码网络平台输出测试(A "Hello, World!"program generally is a computer program that outputs or displays the message "Hello, World!". Such a program is very simple in most programming languages, and is often used to illustrate the basic syntax of a programming language. It is often the first program written by people learning to code.)

java使用snmp4j实现简单的对设备监控源码,完全可以使用，经过过本人测试运行。(Use simple java snmp4j source for equipment monitoring, can be used after the test run over me.)

java实现R树空间索引,包含3个测试文件(rtree is completed by java)

java AES 和 DES加密解密工具类(Java AES and DES Encryption and Decryption Tool Class)

java 弹出框 例子，可以直接引用使用(web frame source,easy to study and easy to use in your project)

The method setPrefix raises a INVALID_CHARACTER_ERR if the specified prefix contains an illegal character.

java实现的电子白板程序，功能完善，代码适合初学者.(java implementation of the whiteboard program, perfect function, the code is suitable for beginners.)