quoteclient.java

java的书上例子

//例16_8 客户方程序 QuoteClient.java
import java.io.*;
import java.net.*;
 import java.util.*;

public class QuoteClient{
public static void main(String[]args) throws IOException{
if(args.length !=1){
   System.out.println("Usage:java QuoteClient<hostname>");
   return;
}

//get a datagram socket
DatagramSocket socket=new DatagramSocket();

//send request
byte[] buf=new byte[256];
InetAddress address=InetAddress.getByName(args[0]);
DatagramPacket packet=new DatagramPacket(buf, buf.length,address,4445);
socket.send(packet);

  //get response
packet=new DatagramPacket(buf,buf.length);
socket.receive(packet);

//get response
packet=new DatagramPacket(buf, buf.length);
socket.receive(packet);

//display response
String received=new String(packet.getData());
System.out.println("Quote of the Moment:"+received);

socket.close();
  }
}