udpget.java

来自「java制作的UDP通信需要的自己下吧辛苦了啊」· Java 代码 · 共 60 行

import java.net.*;
import java.awt.*;
import java.awt.event.*;
public class UDPGet extends Frame implements ActionListener
{
	TextArea TextArea1=new TextArea();
	Button button1=new Button();
    public static void main(String[] args)
    {
    	UDPGet get=new UDPGet();
    	get.setLocation(100,100);
     	get.setSize(300,200);
    	get.show();
     	get.waitForData();
    }
    public UDPGet()
    {
    	try
    	{
	    	jbInit();
     	}
    	catch(Exception e)
     	{
	    	e.printStackTrace();
    	}
   }
   void waitForData()
   {
    	try
    	{
	    	byte[] buffer=new byte[1024];
	     	DatagramPacket packet=new DatagramPacket(buffer,buffer.length);
	    	DatagramSocket socket=new DatagramSocket(9999);
	    	while(true)
	    	{
		    	socket.receive(packet);
		    	String s=new String(buffer,0,0,packet.getLength());
		    	TextArea1.append(s+"\n");
		    	packet=new DatagramPacket(buffer,buffer.length);
	    	}
    	}catch(Exception e)
	    {
    	}
   }
   private void jbInit() throws Exception
   {
    	this.setTitle("接受数据报");
    	TextArea1.setText("");
       	button1.setLabel("退出 ");
    	this.add(TextArea1,BorderLayout.CENTER);
    	this.add(button1,BorderLayout.SOUTH);
     	button1.addActionListener(this);
   }
   public void actionPerformed(ActionEvent e)
   {
    	Component com=(Component)e.getSource();
    	if(com.equals(button1))
	    	System.exit(0);
   }
}