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

  public byte[] read(int port) throws IOException {
    DatagramSocket serverSocket = new DatagramSocket(port);
    byte[] receiveData = new byte[1024];
        DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
        System.out.println("aguardando conexao");
        serverSocket.receive(receivePacket);
        System.out.println("conexao estabelecida");
        receiveData = receivePacket.getData();
        return receiveData;
  }

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      socket = new DatagramSocket();
      broadcast(udpPort, socket);
      socket.setSoTimeout(timeoutMillis);
      DatagramPacket packet = new DatagramPacket(new byte[0], 0);
      try {
        socket.receive(packet);
      } catch (SocketTimeoutException ex) {
        if (INFO) info("kryonet", "Host discovery timed out.");
        return null;
      }
      if (INFO) info("kryonet", "Discovered server: " + packet.getAddress());

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      broadcast(udpPort, socket);
      socket.setSoTimeout(timeoutMillis);
      while (true) {
        DatagramPacket packet = new DatagramPacket(new byte[0], 0);
        try {
          socket.receive(packet);
        } catch (SocketTimeoutException ex) {
          if (INFO) info("kryonet", "Host discovery timed out.");
          return hosts;
        }
        if (INFO) info("kryonet", "Discovered server: " + packet.getAddress());

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                } else if (to instanceof Integer) {
                    i = (Integer)to;
                }
                if (i == null || i <= 0 || message.getExchange().isSynchronous()) {
                    socket.setSoTimeout(30000);
                    socket.receive(p);
                    dataReceived(message, IoBuffer.wrap(bytes, 0, p.getLength()), false, false);
                } else {
                    socket.setSoTimeout(i);
                    boolean found = false;
                    try {

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                } else {
                    socket.setSoTimeout(i);
                    boolean found = false;
                    try {
                        while (true) {
                            socket.receive(p);
                            dataReceived(message, IoBuffer.wrap(bytes, 0, p.getLength()), false, true);
                            found = true;
                        }
                    } catch (java.net.SocketTimeoutException ex) {
                        if (!found) {

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        Thread.sleep(1000);


        byte[] buf = new byte[128];
        DatagramPacket receive = new DatagramPacket(buf, buf.length, address, getPort());
        LOG.debug("+++ Receiving data +++");
        socket.receive(receive);


        socket.close();


        return new String(receive.getData(), 0, receive.getLength());
    }

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        Thread.sleep(1000);


        byte[] buf = new byte[128];
        DatagramPacket receive = new DatagramPacket(buf, buf.length, address, getPort());
        LOG.debug("+++ Receiving data +++");
        socket.receive(receive);


        socket.close();


        return new String(receive.getData(), 0, receive.getLength());
    }

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      DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length,
          IPAddress, Nfs3Constant.SUN_RPCBIND);
      clientSocket.send(sendPacket);
      DatagramPacket receivePacket = new DatagramPacket(receiveData,
          receiveData.length);
      clientSocket.receive(receivePacket);
      clientSocket.close();


    } catch (UnknownHostException e) {
      System.err.println("Don't know about host: localhost.");
      System.exit(1);

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        for (int i = 0; i < 10; i++) {
            fillWriteBuffer(writeBuf, i);
            client.send(wp);


            client.receive(rp);
            assertEquals(writeBuf.length, rp.getLength());
            assertEquals(writeBuf, readBuf);
        }


        try {

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            assertEquals(writeBuf.length, rp.getLength());
            assertEquals(writeBuf, readBuf);
        }


        try {
            client.receive(rp);
            fail("Unexpected incoming data.");
        } catch (SocketTimeoutException e) {
        }


        client.close();

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