udpclient.java

JAVA客户机和服务器应用程序设计,有UDP和TCP,课本的源码,我们的课程设计

import java.io.*;
import java.net.*;
class UDPClient {
	public static void main (String argv[]) throws Exception
	{
	BufferedReader inFromUser =
	new BufferedReader(new InputStreamReader
	(System.in));
	DatagramSocket clientSocket = new DatagramSocket();
	InetAddress IPAddress =
	 InetAddress.getByName("125.221.168.44");
	 byte[] sendData = new byte[1024];
	 byte[] receiveData = new byte[1024];
	 String sentence = inFromUser.readLine();
	 sendData = sentence.getBytes();
	 DatagramPacket sendPacket =
	 new DatagramPacket(sendData,sendData.length,IPAddress,8080);
	 clientSocket.send(sendPacket);
	 DatagramPacket receivePacket =
	 new DatagramPacket(receiveData,receiveData.length);
	 clientSocket.receive(receivePacket);
	 String modifiedSentence =
	 new String(receivePacket.getData());
	 System.out.println("FROM SERVER:" +
	 modifiedSentence);
	 clientSocket.close();
	 }
	 }