UDP学习2(接收端demo)

 1 class UDPReceiveDemo
 2 {
 3     public static void main(String[]args)throws Exception
 4     {
 5         //建立接收端socket服务
 6         DatagramSocket ds=new DatagramSocket(12222);//明确监听的端口号
 7         //创建接收数据的数据包
 8         byte[] buf=new byte[1024];
 9         DatagramPacket dp=new DatagramPacket(buf,buf.length);
10         //接收数据
11         ds.receive(dp);
12         //打印数据
13         System.out.println(dp.getAddress());
14         System.out.println(dp.getPort());
15         System.out.println(new String(dp.getData(),0,dp.getLength()));
16         //关闭服务
17         ds.close();
18     }
19 }