Example usage for java.net DatagramPacket DatagramPacket

Introduction

In this page you can find the example usage for java.net DatagramPacket DatagramPacket.

Prototype

public DatagramPacket(byte buf[], int length)

Source Link

Document

Constructs a DatagramPacket for receiving packets of length length .

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    DatagramPacket pack = new DatagramPacket(new byte[BUFFERSIZE], BUFFERSIZE);
    DatagramSocket sock = new DatagramSocket(7);
    // echo back everything
    while (true) {
        sock.receive(pack);// ww w. j a va2 s.c o  m
        sock.send(pack);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    byte[] ary = new byte[128];
    DatagramPacket pack = new DatagramPacket(ary, 128);

    // read/*from w ww .jav  a2  s. c  om*/
    DatagramSocket sock = new DatagramSocket(1111);
    sock.receive(pack);
    String word = new String(pack.getData());
    System.out.println("From: " + pack.getAddress() + " Port: " + pack.getPort());
    System.out.println(word);
    sock.close();
    // write
    sock = new DatagramSocket();
    pack.setAddress(InetAddress.getByName(args[1]));
    pack.setData(args[2].getBytes());
    pack.setPort(1111);
    sock.send(pack);
    sock.close();

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    DatagramSocket ds = new DatagramSocket(3000);
    byte[] buf = new byte[1024];
    DatagramPacket dp = new DatagramPacket(buf, 1024);
    ds.receive(dp);//from w  w w. jav  a2  s.c  o  m
    String strRecv = new String(dp.getData(), 0, dp.getLength()) + " from " + dp.getAddress().getHostAddress()
            + ":" + dp.getPort();
    System.out.println(strRecv);
    ds.close();
}

From source file:PacketReceiver.java

public static void main(String[] args) throws Exception {
    byte[] buffer = new byte[1024];
    DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
    DatagramSocket socket = new DatagramSocket(5002);
    socket.receive(packet);/*from  ww w  .  j  av a  2s .c  om*/
    System.out.println(packet.getSocketAddress());
    buffer = packet.getData();
    System.out.println(new String(buffer));
}

From source file:Main.java

public static void main(String[] args) {
    try {/*from  ww  w  .  ja  va 2s .  c  o  m*/
        byte[] buffer = new byte[1024];
        DatagramPacket packet = new DatagramPacket(buffer, buffer.length);

        DatagramSocket socket = new DatagramSocket(5002);

        System.out.println("Waiting for a packet...");
        socket.receive(packet);

        System.out.println("Just received packet from " + packet.getSocketAddress());
        buffer = packet.getData();

        System.out.println(new String(buffer));

    } catch (IOException e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {

    MulticastSocket msocket = new MulticastSocket(9999);
    byte[] inbuf = new byte[1024];
    DatagramPacket packet = new DatagramPacket(inbuf, inbuf.length);

    msocket.receive(packet);//  www. j av a  2 s. c om

    // Data is now in inbuf
    int numBytesReceived = packet.getLength();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    byte[] inbuf = new byte[256]; // default size
    DatagramSocket socket = new DatagramSocket();

    DatagramPacket packet = new DatagramPacket(inbuf, inbuf.length);
    socket.receive(packet);/*  w w  w. j  av a  2  s . c  om*/

    int numBytesReceived = packet.getLength();
    System.out.println(numBytesReceived);
}

From source file:UdpEchoServer.java

public static void main(String[] args) {
    DatagramSocket sock;/*from w  ww.  j  av  a 2s.  c om*/
    DatagramPacket pack = new DatagramPacket(new byte[BUFFERSIZE], BUFFERSIZE);
    try {
        sock = new DatagramSocket(7);
    } catch (SocketException e) {
        System.out.println(e);
        return;
    }
    // echo back everything
    while (true) {
        try {
            sock.receive(pack);
            sock.send(pack);
        } catch (IOException ioe) {
            System.out.println(ioe);
        }
    }
}

From source file:WriteServer.java

public static void main(String args[]) throws Exception {
    int clientPort = 999;

    int buffer_size = 1024;

    byte buffer[] = new byte[buffer_size];
    DatagramSocket ds = new DatagramSocket(clientPort);
    while (true) {
        DatagramPacket p = new DatagramPacket(buffer, buffer.length);
        ds.receive(p);//from ww w  .  j a va 2  s.  com
        System.out.println(new String(p.getData(), 0, p.getLength()));
    }
}

From source file:UDP0.java

public static void main(String[] args) throws Exception {
    byte[] ary = new byte[128];
    DatagramPacket pack = new DatagramPacket(ary, 128);
    if (args[0].charAt(0) == 'r') {
        // read//w  w w  .  ja va  2s.  c o m
        DatagramSocket sock = new DatagramSocket(1111);
        sock.receive(pack);
        String word = new String(pack.getData());
        System.out.println("From: " + pack.getAddress() + " Port: " + pack.getPort());
        System.out.println(word);
        sock.close();
    } else { // write
        DatagramSocket sock = new DatagramSocket();
        pack.setAddress(InetAddress.getByName(args[1]));
        pack.setData(args[2].getBytes());
        pack.setPort(1111);
        sock.send(pack);
        sock.close();
    }
}