import java.net.*;
import java.io.*;
  
public class ksamp_udp {
  
  public static final String HOST = "192.168.0.200"; //通信先IPアドレス
  public static final int    PORT = 20000;           //通信先ポート番号
 
  public static void main(String args[]) {
    DatagramSocket socket = null;
    InetSocketAddress remoteAddress = new InetSocketAddress( HOST, PORT);
 
    try {

      socket = new DatagramSocket();  //通信路確保
      byte[] recv_buff = new byte[1024];
      DatagramPacket recv_packet = new DatagramPacket(recv_buff, recv_buff.length);

      while(true){ //プログラム永久ループ

        //1)コマンド送信
        String send_text = "1 mix";
        byte[] send_buff = send_text.getBytes();
        DatagramPacket send_packet = new DatagramPacket(send_buff, send_buff.length, remoteAddress);
        socket.send(send_packet);

        //2)データ受信
        try {
          socket.setSoTimeout(500);
          socket.receive(recv_packet);
          String rect_text = new String(recv_buff, 0, recv_packet.getLength());
          System.out.println(  "受信データ=" + rect_text);
        } catch( SocketTimeoutException ex ) {
          System.out.println(  "TIMEOUT"); //受信タイムアウト
          continue;
        }
      }
      
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      socket.close();
    }

  }//main()
 
}