发送端

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class Send {
	public static void main(String[] args) throws IOException {
		//创建发送端对象
		DatagramSocket ds=new DatagramSocket();
		
		//创建数据，并把数据打包
		byte[] bys= "hello,world,java,我来了".getBytes();
		DatagramPacket dp=new DatagramPacket(bys,bys.length,InetAddress.getByName("192.168.56.1"),10086);
		
		//发送数据
		ds.send(dp);
		
		//关闭发送端
		ds.close();
		
	}

}

接收端

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;

public class Receive {
	public static void main(String[] args) throws IOException {
		//创建接受端
		DatagramSocket ds = new DatagramSocket(10086);
		
		//创建一个数据包，接收数据
		byte[] bys=new byte[1024];
		DatagramPacket dp = new DatagramPacket(bys,bys.length);
		
		//调用方法接收数据
		ds.receive(dp);
		
		//解析数据包，并在控制台显示
		byte[] datas=dp.getData();
		System.out.println("数据是："+new String(datas,0,dp.getLength()));
		
		//关闭接收端
		ds.close();
		
	}
	

	
}