用java编写的聊天程序

import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.io.*; import java.net.*; import java.applet.*; public class Server extends Thread implements ActionListener{ static Server ser=new Server(); static JTextArea ta1=new JTextArea(30,44); static JTextArea ta2=new JTextArea(5,44); static JButton send=new JButton("发送"); static DataInputStream din; static DataOutputStream dout; //static Applet app=new Applet(); //static AudioClip media; public static void main(String args[]){ JFrame f=new JFrame("服务器端"); f.setLayout(new BorderLayout()); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel p=(JPanel)f.getContentPane(); f.setSize(400,600); f.setLocation(600,100); p.setBackground(Color.cyan); JPanel p1=new JPanel(); p1.setLayout(new GridLayout(2,1,10,10)); JPanel p2=new JPanel(); p2.setLayout(new FlowLayout(FlowLayout.RIGHT)); p1.setBackground(Color.cyan); p2.setBackground(Color.cyan); ta1.setBackground(Color.orange); ta1.setForeground(Color.BLACK); ta2.setBackground(Color.orange); ta2.setForeground(Color.black); p1.add(new JScrollPane(ta1)); p1.add(new JScrollPane(ta2)); send.setBackground(Color.orange); send.setForeground(Color.blue); send.addActionListener(ser); p2.add(send); f.add(p1,BorderLayout.CENTER); f.add(p2,BorderLayout.SOUTH); f.setVisible(true); try{ ServerSocket ss=new ServerSocket(8000); Socket s=ss.accept(); InputStream in=s.getInputStream(); OutputStream out=s.getOutputStream(); din=new DataInputStream(in); dout=new DataOutputStream(out); //media=app.getAudioClip(app.getCodeBase(),"msg.wav"); }catch(Exception es){} ser.start(); } public void actionPerformed(ActionEvent e){ String s=ta2.getText(); try{ dout.writeUTF(s); ta1.append("服务器说: "+s+"\n"); ta2.setText(""); } catch(Exception ex){} } public void run(){ while(true){ try{ String s=din.readUTF(); ta1.append("来客说: "+s+"\n"); // if(s!=null) // media.play(); } catch(Exception e){} } } }