利用socket编写聊天程序

import java.awt.Frame;
import java.awt.Label;
import java.awt.Panel;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class ServerProgram extends Frame implements ActionListener{

   Label label=new Label("交谈内容");
   Panel panel=new Panel();
   TextField tf=new TextField(10);
   TextArea ta=new TextArea();
   ServerSocket server;
   Socket client;
   InputStream in;
   OutputStream out;
   public ServerProgram() {
       super("服务器");
       setSize(250, 250);
       panel.add(label);panel.add(tf);
       tf.addActionListener(this);
       add("North", panel);add("Center", ta);

       addWindowListener(new WindowAdapter() {
           public void windowClosing(WindowEvent e) {
               System.exit(0);
           }
       });
       setVisible(true);

       try {
           server=new ServerSocket(4000);
           client=server.accept();
           ta.append("客户机是："+client.getInetAddress().getHostName()+"\n\n");
           in=client.getInputStream();
           out=client.getOutputStream();
       } catch (IOException e1) {   }
       while(true) {
           try {
               byte[] buf=new byte[256];
               in.read(buf);
               String str=new String(buf);
               ta.append("客户机说："+str+"\n");
           } catch (IOException e1) {   }
       }
   }

   public void actionPerformed(ActionEvent e) {
       try {
           String str=tf.getText();
           byte[] buf=str.getBytes();
           tf.setText(null);
out.write(buf);
ta.append("我说："+str+"\n");
       } catch (IOException ioe) {   }
   }
   public static void main(String[] args) {
       new ServerProgram();
   }
}

public class ClientProgram extends Frame implements ActionListener{
   Label label=new Label("交谈内容");
   Panel panel=new Panel();
   TextField tf=new TextField(10);
   TextArea ta=new TextArea();
   Socket client;
   InputStream in;
   OutputStream out;
   public ClientProgram() {
       super("客户机");
       setSize(250, 250);
       panel.add(label);panel.add(tf);
       tf.addActionListener(this);
       add("North", panel);add("Center", ta);

       addWindowListener(new WindowAdapter() {
           public void windowClosing(WindowEvent e) {
               System.exit(0);
           }
       });
       setVisible(true);

       try {
       client=new Socket(InetAddress.getLocalHost(), 4000);
           ta.append("服务器是："+client.getInetAddress().getHostName()+"\n\n");
           in=client.getInputStream();
           out=client.getOutputStream();
       } catch (IOException e1) {   }
       while(true) {
           try {
               byte[] buf=new byte[256];
               in.read(buf);
               String str=new String(buf);
               ta.append("服务器说："+str+"\n");
           } catch (IOException e1) {   }
       }
   }

   public void actionPerformed(ActionEvent e) {
       try {
           String str=tf.getText();
           byte[] buf=str.getBytes();
           tf.setText(null);
out.write(buf); //将字节数组写入到流
ta.append("我说："+str+"\n");
       } catch (IOException ioe) {   }
   }
   public static void main(String[] args) {
       new ClientProgram();
   }
}

运行结果：

利用socket编写聊天程序

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