udpclient.java

Java网络编程应用：包括简易聊天程序的客服端和服务器端的源代码

import java.net.*;

public class UDPClient extends Object
{   public static void main(String args[ ])
    {   try
        {   DatagramSocket dgs=new DatagramSocket( );
     //       byte[ ] buf=new byte[1024];
			String str="hello world";
			byte[] buf=str.getBytes();
            DatagramPacket p=new DatagramPacket(buf,buf.length,InetAddress.getLocalHost( ),8765);

            for(int i=0;i<3;i++)
            {   dgs.send(p);
                System.out.println("客户机发送完毕数据报！");
                dgs.receive(p);
                System.out.println("客户机接收到返回的数据报！");
                System.out.println(new String(buf,p.getLength()));
                Thread.sleep(2000);
            }
        }
        catch(Exception e)
        {   e.printStackTrace( );
        }
    }
}