recvtest.java

本压缩文件中含有线程的控制

package net;

import java.net.*;
import java.io.*;

public class RecvTest {
	
	public static void main(String[] args){
		try {
			DatagramSocket ds = new DatagramSocket(6000);
			byte[] buff = new byte[255];
			DatagramPacket dp = new DatagramPacket(buff,255);
			ds.receive(dp);
			
			System.out.println(new String(buff,0,dp.getLength()));
			
			String str = "welcome";
			
			DatagramPacket dpSend = new DatagramPacket(str.getBytes(),0,str.length(),
					dp.getAddress(),dp.getPort());
			
			ds.send(dpSend);
			
			
			ds.close();
		} catch (SocketException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch(IOException e){
			e.printStackTrace();
		}
	}

}