java网络编程学习笔记

import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
public class SocketClient extends Frame implements ActionListener
{ Label label=new Label("输入聊天信息");
  TextField tf= new TextField(20);
  TextArea ta=new TextArea( );
  Panel panel=new Panel( );//创建面板对象
  Socket Client;
  InputStream DataIn;
  OutputStream DataOut;
  public SocketClient( )
  { super("这里是客户机");
    setSize(300,180);
    panel.add(label);//在面板上添加标签
    panel.add(tf);//在面板上添加文本框
    tf.addActionListener(this);//注册
    add("South",panel);//在窗体上添加面板
    add("Center",ta);//在窗体上添加文本区
    addWindowListener(new WindowAdapter( )
    { public void windowClosing(WindowEvent e)
    { System.exit(0);}});
    show( );
    try
     {  Client=new Socket(InetAddress.getLocalHost( ),5000);
        ta.append("已经和服务器连接:"+Client.getInetAddress( ).getHostName( )+"/n/n");
        DataIn=Client.getInputStream( );
        DataOut=Client.getOutputStream( );
    }
    catch(IOException ioe){ }
    while(true)
    {
     try{
      byte buff[ ]=new byte[512];//缓冲数组
      DataIn.read(buff);
      String str=new String(buff);//接受客户端发送的数据包
      ta.append("服务器说:"+str+"/n");
     }
     catch(IOException ioe){ }
    }
    }
    public static void main(String args[ ])
    {
     new SocketClient( );
    }
    public void actionPerformed(ActionEvent e)//事件处理程序
    {
     try
      {
      String str=new String(tf.getText());
      byte buf[ ]=str.getBytes( );
      tf.setText(" ");
      DataOut.write(buf);
      ta.append("客户机说:"+str+"/n");
     }
      catch(IOException ioe){ }
    }
    }
 

 

 

 

 

//服务器端程序
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
public class SocketServer extends Frame implements ActionListener{
  Label label=new Label("输入聊天信息");
  TextField tf= new TextField(20);
  TextArea ta=new TextArea( );
  Panel panel=new Panel( );//创建面板对象
  ServerSocket server;
  Socket Client;
  InputStream DataIn;
  OutputStream DataOut;
  public SocketServer( ){
 super("这里是服务器");
    setSize(300,180);
    panel.add(label);//在面板上添加标签
    panel.add(tf);//在面板上添加文本框
    tf.addActionListener(this);//注册
    add("South",panel);//在窗体上添加面板
    add("Center",ta);//在窗体上添加文本区
    addWindowListener(new WindowAdapter( ){
     public void windowClosing(WindowEvent e)
             { System.exit(0);}});
    show( );
    try
     { server = new ServerSocket(5000);
        Client= server.accept( );
        ta.append("已经和客户机连接:"+Client.getInetAddress( ).getHostName( )+"/n/n");
        DataIn=Client.getInputStream( );
        DataOut=Client.getOutputStream( );
    }
    catch(IOException ioe){ }
    while(true)
    {
     try{
      byte buff[ ]=new byte[512];//缓冲数组
      DataIn.read(buff);
      String str=new String(buff);//接受客户端发送的数据包
      ta.append("客户机说:"+str+"/n");
     }
     catch(IOException ioe){ }
    }
    }
    public static void main(String args[ ])
    {
     new SocketServer( );
    }
    public void actionPerformed(ActionEvent e)//事件处理程序
    {
     try
      {
      String str=new String(tf.getText());
      byte buf[ ]=str.getBytes( );
      tf.setText(" ");
      DataOut.write(buf);
      ta.append("服务器说:"+str+"/n");
     }
      catch(IOException ioe){ }
    }
    }