package com.bobohe.socket;

import java.io.*;

import java.net.*;

class UDPClient{

public static void main(String[] args)throws IOException{

DatagramSocket client = new DatagramSocket();

String sendStr = 'Hello! I'm Client';

byte[] sendBuf;

sendBuf = sendStr.getBytes();

InetAddress addr = InetAddress.getByName('127.0.0.1');

int port = 5050;

DatagramPacket sendPacket = new DatagramPacket(sendBuf ,sendBuf.length , addr , port);

//發(fā)送數(shù)據(jù)

client.send(sendPacket);

byte[] recvBuf = new byte[100];

DatagramPacket recvPacket

= new DatagramPacket(recvBuf , recvBuf.length);

//接收數(shù)據(jù)

client.receive(recvPacket);

String recvStr = new String(recvPacket.getData() , 0 ,recvPacket.getLength());

System.out.println('收到:' + recvStr);

client.close();

}

}

package com.bobohe.socket;

import java.io.*;

import java.net.*;

class UDPServer {

public static void main(String[] args) throws IOException {

DatagramSocket server = new DatagramSocket(5050);

byte[] recvBuf = new byte[100];

DatagramPacket recvPacket = new DatagramPacket(recvBuf, recvBuf.length);

server.receive(recvPacket);

String recvStr = new String(recvPacket.getData(), 0,

recvPacket.getLength());

System.out.println('Hello World!' + recvStr);

int port = recvPacket.getPort();

InetAddress addr = recvPacket.getAddress();

String sendStr = 'Hello ! I'm Server';

byte[] sendBuf;

sendBuf = sendStr.getBytes();

DatagramPacket sendPacket = new DatagramPacket(sendBuf, sendBuf.length,

addr, port);

server.send(sendPacket);

server.close();

}

}