udprecv.java

ＵＤＰ编程例子．采用ＪＡＶＡ 网络编程．

import java.net.*;
public class UdpRecv  
{
	public static void main(String[] args) throws Exception
	{
		DatagramSocket ds=new DatagramSocket(3000);
		byte[] buf=new byte[1024];
		DatagramPacket dp=new DatagramPacket(buf,1024);
		ds.receive(dp);
		System.out.println(new String(dp.getData(),0,dp.getLength()));  //返回字节数组，即buf
		System.out.println("\n");
		System.out.println(dp.getAddress().getHostAddress()+":"+dp.getPort());//发送方IP
		ds.close();
	}
}