Examples of java.net.DatagramSocket.receive()

java.net.DatagramSocket.receive()
Receives a datagram packet from this socket. When this method returns, the DatagramPacket's buffer is filled with the data received. The datagram packet also contains the sender's IP address, and the port number on the sender's machine.
This method blocks until a datagram is received. The length field of the datagram packet object contains the length of the received message. If the message is longer than the packet's length, the message is truncated.
If there is a security manager, a packet cannot be received if the security manager's checkAccept method does not allow it. @param p the DatagramPacket into which to placethe incoming data. @exception IOException if an I/O error occurs. @exception SocketTimeoutException if setSoTimeout was previously calledand the timeout has expired. @exception PortUnreachableException may be thrown if the socket is connectedto a currently unreachable destination. Note, there is no guarantee that the exception will be thrown. @exception java.nio.channels.IllegalBlockingModeException if this socket has an associated channel, and the channel is in non-blocking mode. @see java.net.DatagramPacket @see java.net.DatagramSocket @revised 1.4 @spec JSR-51

        DataInputStream dataIn = null;
        fromDriverStationSocket.setSoTimeout(2000);
        boolean reportedWaitingForPacket = false;
        while (true) {
            try {
                fromDriverStationSocket.receive(packet);
            } catch (SocketTimeoutException e) {
                if (!reportedWaitingForPacket) {
                    //System.out.println("Waiting for packet from Driver Station");
                    reportedWaitingForPacket = true;
                }

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            while (true) {
                DatagramPacket pac = new DatagramPacket(new byte[1500], 1500);
                DHCPPacket     dhcp;


                socket.receive(pac);
                dhcp = DHCPPacket.getPacket(pac);
                System.out.println(dhcp.toString());
            }
        } catch (Exception e) {
            e.printStackTrace();

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    InetAddress address=InetAddress.getByName(host);
    DatagramPacket packet=new DatagramPacket(buf, buf.length, address, port);
    udpsock.send(packet);
    
    DatagramPacket response=new DatagramPacket(new byte[100], 100);
    udpsock.receive(response);
    String location=new String(response.getData(), 0, response.getLength());
    return new NameServerProxy(new PyroURI(location));
  }
}

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      appender.close();
      String[] retval = new String[packets];
      byte[] buf = new byte[1000];
      for(int i = 0; i < packets; i++) {
          DatagramPacket p = new DatagramPacket(buf, 0, buf.length);
          ds.receive(p);
          retval[i] = new String(p.getData(), 0, p.getLength());
      }
      ds.close();
      return retval;
    }

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      appender.close();
      String[] s = new String[3];
      byte[] buf = new byte[1000];
      for(int i = 0; i < 3; i++) {
          DatagramPacket p = new DatagramPacket(buf, 0, buf.length);
          ds.receive(p);
          s[i] = new String(p.getData(), 0, p.getLength());
      }
      ds.close();
      assertEquals("<14><!DOCTYPE", s[0].substring(0,13));
      assertEquals("<14></table>", s[2].substring(0,12));

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      appender.close();
      String[] s = new String[8];
      byte[] buf = new byte[1200];
      for(int i = 0; i < 8; i++) {
          DatagramPacket p = new DatagramPacket(buf, 0, buf.length);
          ds.receive(p);
          assertTrue(p.getLength() <= 1024);
          s[i] = new String(p.getData(), 0, p.getLength());
      }
      ds.close();
      StringBuffer rcvbuf = new StringBuffer(s[0]);

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        socket.send(outboundPacket);


        // receive whatever came back
        byte[] receiveBuffer = new byte[bytesToSend.length];
        DatagramPacket inboundPacket = new DatagramPacket(receiveBuffer, receiveBuffer.length);
        socket.receive(inboundPacket);


        // compare byte buffers as strings so we get to see the diff
        assertEquals(Arrays.toString(outboundPacket.getData()), Arrays.toString(inboundPacket.getData()));


        // make sure the contents are really the same

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            socket.send(outboundPacket);


            // receive whatever came back
            byte[] receiveBuffer = new byte[bytesToSend.length];
            DatagramPacket inboundPacket = new DatagramPacket(receiveBuffer, receiveBuffer.length);
            socket.receive(inboundPacket);


            // compare byte buffers as strings so we get to see the diff
            assertEquals(Arrays.toString(outboundPacket.getData()),
                Arrays.toString(inboundPacket.getData()));

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    while ((socket = this.socket) != null 
        && !socket.isClosed()) {
      
      try {
        packet.setData(buffer);
        socket.receive(packet);
        
        process(packet);
      } catch (IOException err) {
        uncaughtException(socket, err);
      }

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    while (!socket.isClosed() && socket.isBound()) {
      try {
        byte[] buffer = new byte[DEFAULT_MTU_SIZE];
        DatagramPacket datagram = new DatagramPacket(buffer, buffer.length);
        socket.receive(datagram);
        
        RudpPacket packet = new RudpPacket(datagram);
        
        if (packet.getMessageType() == PACKET_MESSAGE_TYPE_UDP) {
          SocketAddress address = packet.getSocketAddress();

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