udpclient.java

来自「java课件 java课件 java课件 java课件」· Java 代码 · 共 39 行

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

public class UDPClient{
  public static void main(String args[]){
  	byte[] bufsend = null;
  	String sendMessage=null;
  	try{
  	  DatagramSocket socket = new DatagramSocket();
  	  BufferedReader sysin = new BufferedReader(
  	  	           new InputStreamReader(System.in));
  	   while(true){
  	    System.out.println("Waiting for input a line text...");
  	    sendMessage = sysin.readLine();
  	    bufsend = sendMessage.getBytes();
  	    
  	  	//used for sending message
DatagramPacket packet = new DatagramPacket(  	  		 bufsend,sendMessage.length(),
InetAddress.getLocalHost(),8888);
  	  	socket.send(packet);
  	  	if(sendMessage.equals("bye"))
  	  	  break;
  	  	  
  	  	byte[] bufrec=new byte[50];
  	  	//used for receiving data
  	  	DatagramPacket receivePacket =
 new DatagramPacket(bufrec,50);  
  	  	socket.receive(receivePacket);
  	  	String received = new String(receivePacket.getData());
  	  	System.out.println("From Server:"+received);
  	  }
  	  socket.close();
  	  
  	}catch(Exception e){
  		e.printStackTrace();
  	}
  }
}