/** Main entry to the program. */ public static void main(String[] args) { RemoteControl remote = new RemoteControl(); RemoteDevice racecar = Bluetooth.getKnownDevice("Batmobile"); if (racecar == null) { System.out.println("No Such device existed"); System.exit(1); } BTConnection racecarConnection = Bluetooth.connect(racecar); if (racecarConnection == null) { System.out.println("Connection Failed"); System.exit(1); } else { System.out.println("Connected to Racecar"); } DataOutputStream dos = racecarConnection.openDataOutputStream(); try { System.out.println("Sending controller signal"); dos.writeInt(CONTROLLER_DEVICE); dos.flush(); System.out.println("Sent Controller signal"); } catch (Exception ex) { // Do nothing } remote.setRacecarConnection(racecarConnection); remote.setRacecarOutputStream(dos); // Waiting for flag to set us off here System.out.println("Waiting for Flag connection"); NXTConnection flagConnection = Bluetooth.waitForConnection(); System.out.println("Connected to flag"); DataInputStream dis = flagConnection.openDataInputStream(); try { int check = dis.readInt(); if (check == FLAG_SIGNAL) { System.out.println("Recived flag signal"); dos.writeInt(FLAG_SIGNAL); dos.flush(); System.out.println("sent flag signal to racecar"); dis.close(); remote.run(); } else { System.out.println("Did not recieve flag connection"); } } catch (Exception e) { } }
/** method to disconnect from the server */ public void disconnect() throws IOException { // if stream connection is present then if (streamConnection != null) { // close all streams dataOutputStream.close(); dataInputStream.close(); streamConnection.close(); } // nullify all stream objects dataOutputStream = null; dataInputStream = null; streamConnection = null; // initiate garbage collector System.gc(); // set the connected flag to false indicating no connection connected = false; }