mydatagramsocketb.java

3 pairs of sample codes for basic net apps: . Socket server/client . start the server first . Datagr

import java.net.*;


public class MyDatagramSocketB {
    public static void main(String[] args) {
        try {
            new MyDatagramSocketB().startToSend();
        }
        catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    private void startToSend() throws Exception{
        String msg = "hello from the datagramSocket B.";
        byte sentData[] = msg.getBytes();

        DatagramSocket sockeB = new DatagramSocket();

        DatagramPacket sendPacket = new DatagramPacket(sentData, sentData.length, InetAddress.getByName("localhost"), 3001);
        sockeB.send(sendPacket);

        // receive reply;
        byte buf[] = new byte[500];
        DatagramPacket receivedPacket = new DatagramPacket(buf, buf.length);
        sockeB.receive(receivedPacket);

        System.out.println("BBB: data recieved from A: " + new String(receivedPacket.getData()));

    }
}