基于Socket简单的聊天程序

昨天优快云一个哥们，说让写个聊天的小程序，主要昨晚太晚了，今天早晨起来上班，第一件事，就是写写这个小程序，和同事两个人，实验了下，还是满有意思的。

 

一下是客户端的Applet代码：

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Event;
import java.awt.TextArea;
import java.awt.TextField;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.URL;
/**
 * @author closewubq 客户端
 */
public class ClientApplet extends Applet implements Runnable {
 private static final long serialVersionUID = 1L;
 private TextArea textArea;
 private TextField textfield;
 private DataInputStream in;
 private DataOutputStream out;

 public void init() {
  this.setLayout(null);
  this.setSize(426, 266);
  this.textArea = new TextArea(10, 10);
  this.textfield = new TextField();
  in = null;
  out = null;
  try {
   URL url = this.getCodeBase();
   InetAddress inetAddress = InetAddress.getByName(url.getHost());
   Socket socket;
   socket = new Socket(inetAddress, 5555);
   in = new DataInputStream(socket.getInputStream());
   out &