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TestUDPClient.java

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import java.net.*;

import java.io.*;

public class TestUDPClient

{

public static void main(String args[]) throws Exception

{

long n = 10000L;

ByteArrayOutputStream baos = new ByteArrayOutputStream();

DataOutputStream dos = new DataOutputStream(baos);

dos.writeLong(n);

byte[] buf = baos.toByteArray();

System.out.println(buf.length);

DatagramPacket dp = new DatagramPacket(buf, buf.length,

new InetSocketAddress("127.0.0.1", 5678)

);

DatagramSocket ds = new DatagramSocket(9999);

ds.send(dp);

ds.close();

}

}