这是一个用java代码编写的随机抽奖程序

说明：  照片变成字母符号软件，讲照片转化成符号的形式(Photographs into alphabetic symbols software)

输入两个整数m和n，及另一正整数k，计算m/n，结果精确到小数点后k位(Enter two integers m and n, and another positive integer k, calculated m/n, the result is accurate to k decimal places)

JAVA实现的网络服务器文件同步，分客户端和服务器端代码，-JAVA network file synchronization server, the client-server code

一个非常简单的多线程程序：三个线程随机产生26个英文字母，可以随时暂停线程并继续。用Java的implements Runnable()实现的多线程，当然您也可以用extends Thread class去实现多线程！代码的每一步都有详细的注释便于大家进一步了解多线程功能！(A simple multiple Thread program which based on implementing Runnable interface, you can use extends Thread class as well.)

创建中间企业对象层，是企业应用开发在企业对象基础上进行。(created among enterprises object layer is the development of enterprise application targeted at the enterprise basis.)

Catchguard syntax negative test.

小型户籍管理系统，可以实现基本的增删改查功能(Small household registration management system)

java实现的轻量级WebServer,可以运行于多个平台，支持CGI(C/perl/PHP等)，具有很好的参考价值。-java realization lightweight WebServer, may move Yu Duoge the platform, supports CGI (C/perl/PHP and so on), has the very good reference value.

java写的黑白棋游戏，支持网络游戏方式，Java程序员参考。-Writing Riversi java games, support network games, Java programmers reference.

说明：  多进制数字相位调制也称多元调相或多相制。它利用具有多个相位状态的正弦波来代表多组进制信息码元,即用载波的个相位对应于组进制信息码元。如果载波有2k个相位，它可以代表k位进制码元的不同码组。多进制相移键控也分为多进制绝对相移键控和多进制相对(差分)相移键控。(This m-file simulates mpsk (BPSK,QPSK,8PSK)with theoretical and simulated results using Gray coding. Numerical examples of a satellite link design are shown using QPSK and/or 8PSK when the bit rate(Rb)is greater than the channel bandwidth Wc (Band-limited channel).)