一个实用的聊天系统

收发邮件的程序代码-the e-mail code

用java写的聊天程序。 -Written with java chat program.

Learning a new programming language can be intimidating, especially if you need to get up and running with it quickly. If you are a current Java developer who needs to learn C#, this book is essential. Java and C# share many common characteristics and by focussing on the key similarities and differences between the two languages, From Java to C#: A Developer s Guide enables you to use your existing knowledge of object-oriented concepts to learn C# efficiently and quickly. However, features of C# that are totally absent in Java are given the detailed description they warrant. This practical guide will help you move easily from Java and J2EE to C# and .NET concepts as quickly as possible.

有感应聘Java笔试时可能出现问题及其答案，希望对大家之后笔试有很大帮助-有 ?杏 | ??Java ?适允 ??赡??鱿治侍???其

用Java实现的23个常用设计模式源代码-Java achieve 23 commonly used design patterns source code

jni调用例子 可以调用测试 java jni vc 6 -JNI call test examples, we can call java jni vc 6

客户通过Socket(InetAddress,port)建立与服务器的连接。服务器与客户都通过构造BufferedReader,PrintWriter来建立输入输出流，然后双方通过该输入输出流来相互传递信息，一旦收到客户方的连接请求，服务器accept()方法返回一个新建的Socket对象。客户端然后向服务器发送消息，比如注册，登录，查找好友等，服务器收到来自客户的请求后，针对不同的消息处理请求, 虽然UDP不可靠但是对于icq可靠性并不太重要，而且UDP快速，所以客户间发送信息通过UDP。用户登录时通过类DatagramPacket和DatagramSocket创建UDP包括其本地接受端口以及发送端口，默认端口为5000和5001，通过取得的好友的IP地址来向好友发送消息（send(DatagramPacket)和接受消息(receive(DatagramPacket))。当用户通过UDP收到消息后，可以通过DatagramPacket的方法InetAddress getAddress()得到对方的ip地址，通过对好友列表比较以判断是谁并提示用户收到某某的消息，然后用户选择该用户查看消息，如果好友列表没有该人就显示收到陌生人的消息。用户可以按陌生人按钮查看消息。 -err

jsp+javabean留言本-jsp javabean the message

jpetstor学习，有时间可以一起-jpetstor learning and have time to take a look at

Java源代码4-Java source code 4