udpclient.java

来自「自己编写的Java学习代码」· Java 代码 · 共 30 行

import java.net.*;

public class UDPClient
{
	public static void main(String args[])throws Exception{
		String msg = "我是客户!";
		byte buf[] = msg.getBytes();
		DatagramSocket socket = new DatagramSocket();
		//构建发送数据报
		InetAddress address = InetAddress.getByName("localhost");
		int port = 8000;
		DatagramPacket packet = new DatagramPacket(buf,buf.length,address,port);
		//发送
		socket.send(packet);

		//构建接收数据报
		packet = new DatagramPacket(buf,buf.length);
		//接收数据
		socket.receive(packet);
		//显示数据
		address = packet.getAddress();
		port = packet.getPort();
		msg = new String(packet.getData());
		System.out.println("Address:"+address);
		System.out.println("Port:"+port);
		System.out.println("Msg:"+msg);

		socket.close();
	}
}