Newbie about bluetooth with notebooks

Just need a few questions answered about bluetooth that I didnt quite understand.
Say that Im buying the PowerPC G4 ibook, it says that it has bluetooth 2.0 built in.
Heres the questions.
1)Does that mean that I dont have to buy an adapter for bluetooth? or does it mean that the program itself is already installed and i just need to buy the adapter?
2)Is bluetooth a service that I need to sign up for and pay monthly? If so how much is it per month?
3)Is bluetooth only compatible with other bluetooth users? Does that mean that there must be another bluetooth user in the area in order for me to connect to the internet?
4) Sorry ive never used a laptop or wireless conection. Say that I'm at college and they have a wireless connection at certian buildings, will I be able to connect to the internet using bluetooth?
and thats all.

Hello.
1. You don't need to buy a bluetooth dongle. The hardware is built into the iBook
2. Bluetooth is not a service, you do not need to pay a subscription to use it. It is a wireless 'protocol' that allows different devices (Headsets, phones, printers for example) to connect wirelessly. See for full description - http://en.wikipedia.org/wiki/Bluetooth
3. I am not sure what you mean by this question. You can use bluetooth to connect to different devices. It may well be possbile to wireless connect two iBooks using bluetooth... although I'm not sure why you'd do that, if you've got a 'wireless' (WIFI) on the iBook.
4. Bluetooth and Wifi are both wireless technologies. Wifi is what you would use to connect your laptop to the internet, at college or at a hotspot in Starbucks for example. Bluetooth is used to connect to devices, such as a mobile phone. For example I connect my mobile phone to my iBook and synchronise my address book and calendar between the two.
Hope that makes sense?

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I am a newbie of bluetooth communication. This time I need to have connumication between PC and mobile device (mainly mobile phone) by sending strings. PC is acted as server and mobile device act as client.
For using bluetooth in PC, I use bluecove 2.0.1
I have already connected them successfully.
When I want to send strings between them, it is found that it can only do one cycle of communication (client -> server -> client).
For my design, they can communicate multiple times.
I simulate the core class of the system, the performance is fine.
Cound anyone help me to watch the code and give me some advices?
Server Side - ServerBox.java
public class ServerBox implements Runnable {
   LocalDevice localDevice;
   StreamConnectionNotifier notifier;
   ServiceRecord record;
   boolean isClosed;
   ClientProcessor processor;
   CMDProcessor cmd;
   MainInterface midlet;
   private static final UUID ECHO_SERVER_UUID = new UUID(
           "F0E0D0C0B0A000908070605040302010", false);
   public ServerBox(MainInterface midlet) {
       this.midlet = midlet;
   public void run() {
       boolean isBTReady = false;
       try {
           localDevice = LocalDevice.getLocalDevice();
           if (!localDevice.setDiscoverable(DiscoveryAgent.GIAC)) {
               midlet.showInfo("Cannot set to discoverable");
               return;
           // prepare a URL to create a notifier
           StringBuffer url = new StringBuffer("btspp://");
           url.append("localhost").append(':');
           url.append(ECHO_SERVER_UUID.toString());
           url.append(";name=Echo Server");
           url.append(";authorize=false");
           // create notifier now
           notifier = (StreamConnectionNotifier) Connector.open(url.toString());
           record = localDevice.getRecord(notifier);
           isBTReady = true;
       } catch (Exception e) {
           e.printStackTrace();
       // nothing to do if no bluetooth available
       if (isBTReady) {
           midlet.showInfo("Initalization complete. Waiting for connection");
           midlet.completeInitalization();
       } else {
           midlet.showInfo("Initalization fail. Exit.");
           return;
       // produce client processor
       processor = new ClientProcessor();
       cmd = new CMDProcessor();
       // start accepting connections then
       while (!isClosed) {
           StreamConnection conn = null;
           try {
               conn = notifier.acceptAndOpen();
           } catch (IOException e) {
               // wrong client or interrupted - continue anyway
               continue;
           processor.addConnection(conn);
   // activate the set up of process
   public void publish() {
       isClosed = false;
       new Thread(this).start();
   // stop the service
   public void cancelService() {
       isClosed = true;
       midlet.showInfo("Service Terminate.");
       midlet.completeTermination();
   // inner private class for handling connection and activate connection handling
   private class ClientProcessor implements Runnable {
       private Thread processorThread;
       private Vector queue = new Vector();
       private boolean isOk = true;
       ClientProcessor() {
           processorThread = new Thread(this);
           processorThread.start();
       public void run() {
           while (!isClosed) {
               synchronized (this) {
                   if (queue.size() == 0) {
                       try {
                           // wait for new client
                           wait();
                       } catch (InterruptedException e) { }
               StreamConnection conn;
               synchronized (this) {
                   if (isClosed) {
                       return;
                   conn = (StreamConnection) queue.firstElement();
                   queue.removeElementAt(0);
                   processConnection(conn);
       // add stream connection and notify the thread
       void addConnection(StreamConnection conn) {
           synchronized (this) {
               queue.addElement(conn);
               midlet.showInfo("A connection is added.");
               notify();    // for wait() command in run()
   // receive string
   private String readInputString(StreamConnection conn) {
       String inputString = null;
       try {
           DataInputStream dis = conn.openDataInputStream();
           inputString = dis.readUTF();
           dis.close();
       } catch (Exception e) {
           e.printStackTrace();
       return inputString;
   private void sendOutputData(String outputData, StreamConnection conn) {
       try {
           DataOutputStream dos = conn.openDataOutputStream();
           dos.writeUTF(outputData);
           dos.close();
       } catch (IOException e) {
   // process connecion
   private void processConnection(StreamConnection conn) {
       String inputString = readInputString(conn);
       String outputString = cmd.reactionToCMD(inputString);
       sendOutputData(outputString, conn);
/*       try {
           conn.close();
       } catch (IOException e) {}*/
       midlet.showInfo("Client input: " + inputString + ", successfully received.");
}For "CMDProcessor" , it is the class of message processing before feedback to client.
Client side - ClientBox.java
public class ClientBox implements Runnable, CommandListener{
    StringItem result = new StringItem("","");
    private DiscoveryAgent discoveryAgent;
    private String connString;
    private boolean isClosed = false;
    private boolean boxReady = false;
    StreamConnection conn;
    private static final UUID ECHO_SERVER_UUID = new UUID( "F0E0D0C0B0A000908070605040302010", false);
    Form process = new Form("Process");
    ClientInterface midlet;
    public ClientBox(ClientInterface mid){
        this.midlet = mid;
        process.append(result);
        process.addCommand(new Command("Cancel",Command.CANCEL,1));
        process.setCommandListener(this);
        new Thread(this).start();
    public void commandAction(Command arg0, Displayable arg1) {
        if(arg0.getCommandType()==Command.CANCEL){
            isClosed = true;
            midlet.notifyDestroyed();
    public synchronized void run() {
        LocalDevice localDevice = null;
        boolean isBTReady = false;
        /* Process Gauge screen */
        midlet.displayPage(process);
        Gauge g=new Gauge(null,false,Gauge.INDEFINITE,Gauge.CONTINUOUS_RUNNING);
        process.append(g);
        showInfo("Initalization...");
        System.gc();
        try {
            localDevice = LocalDevice.getLocalDevice();
            discoveryAgent = localDevice.getDiscoveryAgent();
            isBTReady = true;
        } catch (Exception e) {
            e.printStackTrace();
        if (!isBTReady) {
            showInfo("Bluetooth is not avaliable. Please check the device.");
            return;
        if(!isClosed){
            try {
                connString = discoveryAgent.selectService(ECHO_SERVER_UUID, ServiceRecord.NOAUTHENTICATE_NOENCRYPT, false);
            } catch (BluetoothStateException ex) {
                ex.printStackTrace();
        else return;
        if (connString == null) {
            showInfo("Cannot Find Server. Please check the device.");
            return;
        else showInfo("Can Find Server, stand by for request.");
        boxReady = true;
    /* True if the clientbox is ready */
    public boolean getBoxReady(){
        return boxReady;
    /* True if the clientbox is closed in run() */
    public boolean getIsClosed(){
        return isClosed;
    public String accessService(String input) {
        String output = null;
        try {
            /* Connect to server */
            StreamConnection conn = (StreamConnection) Connector.open(connString);
            /* send string */
            DataOutputStream dos = conn.openDataOutputStream();
            dos.writeUTF(input);
            dos.close();
            /* receive string */
            DataInputStream dis = conn.openDataInputStream();
            output = dis.readUTF();
            dis.close();
        } catch (IOException ex){
            showInfo("Fail connect to connect to server.");
        return output;
    private void showInfo(String s){
        StringBuffer sb=new StringBuffer(result.getText());
        if(sb.length()>0){ sb.append("\n"); }
        sb.append(s);
        result.setText(sb.toString());
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    private ClientBox cb = new ClientBox(this);
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    private Command back = new Command("Back", Command.BACK, 1);
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    String out;
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        /* Send message and get reply */
        out = cb.accessService("Proglist");
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    public void destroyApp(boolean unconditional) {
        notifyDestroyed();
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                notifyDestroyed();
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        List temp;
        String[] source = split(message,",") ;
        temp = new List(name, type, source, null);
        return temp;
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        int startIndex = 0;
        Vector v = new Vector();
        String[] str = null;
        int index = 0;
        startIndex = original.indexOf(regex);
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            startIndex = original.indexOf(regex,startIndex + regex.length());
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        for(int i=0;i<v.size();i++)
            str[i] = (String)v.elementAt(i);
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Please remember to come back and mark the post that you feel solved your question as the solution, it earns the member + points
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Mr limitless wrote:
Please release a firmware update to remove this limitation. I am sure I am not the only one out there that finds this a inconvenience.
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eximo
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Neuronetrix
"I had rather be right than be president" -Henry Clay
Attachments:
Bluetooth discover and Pair.vi ‏51 KB

Newbie about bluetooth with notebooks

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