Confusion of constructor

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• confusion in the background process and Globaleventlistener

  Hello

  too confused in Backendprocess.

  Please check my code and then tell me how I can do this.

  I want to add bluetooth address in my tree UIApp MyScreen articles and I bluetooth address storage file and record store.

  but confuesd how do I call the showAdress() method after complition of search BlueTooth.

  public class MyUIApp  extends UiApplication{
  
      public static void main(String[] args) {
          if (args != null && args.length > 0 && args[0].equals("gui"))
          {
              AppBackend appb = new AppBackend();
              appb.enterEventDispatcher();
  
          }
          else
          {
              ApplicationManager appMang = ApplicationManager.getApplicationManager();
              if(appMang.inStartup())
                  return;
              MyUIApp app = new MyUIApp();
              UiApplication.getUiApplication().invokeLater(new Runnable() {
  
                  public void run() {
  
                      ApplicationManager.getApplicationManager().postGlobalEvent(AppConstants.DATA_CHANGED);
                  }
              });
  
              app.enterEventDispatcher();
          }
      }
  
      public void showAdress()
      {
          getting data from record store adding Tree which si on Main Screen.
      }
  }
  

  public class AppBackend extends Application implements GlobalEventListener {
  
      public Timer timer;
      public Vector remote_device;
      public Vector device_found;
  
      BTSearch btSearch;
  
      public AppBackend() {
  
          addGlobalEventListener(this);
          timer = null;
  
      }
  
      public void firststart() {
          btSearch = new BTSearch();
          btSearch.start();
      }
  
      class BTSearch extends Thread implementsDiscoveryListener
      {
  
          boolean stopThread = false;
  
          public void run() {
              startThread();
  
          }
  
          public void startThread() {
  
              timer = new Timer();
  
              timer.schedule(new TimerTask() {
  
                  public void run() {
  
                      startScanBluetoothDevices();
  
              }, 30000, 30000);
  
          }
  
          public void startScanBluetoothDevices() {
              try {
  
                  remote_device = new Vector();
                  device_found = new Vector();
  
                  discovery_agent = LocalDevice.getLocalDevice().getDiscoveryAgent();
                  discovery_agent.startInquiry(DiscoveryAgent.GIAC, this);
  
              } catch (Exception error) {
                  Dialog.alert(error.getMessage());
              }
          }
  
          public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod)
          {
              //
          }
  
          public void inquiryCompleted(int discType)
          {
              //
          }
  
      }
  
      public void eventOccurred(long arg0, int arg1, int arg2, Object arg3,
              Object arg4) {
  
          if (arg0 == AppConstants.DATA_CHANGED) {
  
              firststart();
  
          }
  
      }
  
  }
  

  I'm confuesd how do I call the method showAdrees() If you desire to process bluetooth backend made.

  Now I'm for names of Bluetooth and the storage in the RecordStore. but now the problem is how can I display on my main screen located in UIApplication.

  I am struggling to read this code, it seems not to be complete.

  Sorry, beginning with the obvious things, I assume you have another entry.  Usually one who has the 'gui' param starts the user interface, so I guess that BlueFreeBackround is the treatment of the user interface.  Seems a strange name?  But any.  We do not have this code, so can't review it.

  The other entrance is the one who starts the initial treatment.  In case you're MyUIApp.  But you have this:

  If (appMang.inStartup ())
  return;
  Also if this is executed at boot time, the treatment does nothing.  And you start an application that seems to be the associated user interface.  I'm confused.  And we have no code to the constructor for this class, so we can not comment on that either.  All we know is that this class sends a global event.  Now, if I'm wrong, I don't think you need to start an Application to send a global event.  It is enough to have one to receive a.

  And you have given us another class, but there is no indication how it is started.  Assuming that it is started, it will receive the global event and execute the firststart() method.  Confusingly, this method will start a Thread that starts a timer.  Why can't firststart() him and save a Thread and some confusion?

  OK, now we come to the TimerTask, which is launched every 30 seconds (seems too often to me, but maybe not).  This process begins the investigation.  And we arrive at the point of this thread.  InquiryCompleted, I think you want to call showAddress().

  It's actually easy, although I really don't like this approach:

  Instead of using

  postGlobalEvent (long guid);

  use

  postGlobalEvent (long guid, int data0, data1, object0 object, Object1 int);

  and pass the MyUIApp object as a parameter object0.  Then, you can call

  . showAddress();

  I suspect that this will throw IllegalStateException, so you'll need to hire a

  this.invokeLater (...)

  to ensure that you have the thread of events when refreshing.

  But if I were you, I would consider this approach.  It seems some unnecessary steps.  For example, why doesn't MyUiApp start the discovery itself, what s at the point of the AppBackend?  A; Otherwise, you use a global event to initiate treatment, you could send the data in another GlobalEvent.

• Failed to create the reference to the FXMLLoader controller: "no constructor appropriate."

  Greetings,
  
  I'm in my first two days, experimenting with JavaFX.
  
  I am trying to create a reference to my controller class to in my routine of starting application. All the posts I've seen on this call to the code as follows:
  

   FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("MyFXML.fxml")); 

  But in my NetBeans IDE editor this code reports the error "no suitable constructor found for FXMLLoader (java.net.URL)."
  
  The documentation for the FXMLLoader class undeniably a constructor FXMLLoader (java.net.URL). However, when I access the NetBeans source code, this constructor does not show: the only options are FXMLLoader() and FXMLLoader (Charset arg0).
  
  I use NetBeans 7.1.2 ee version. I was using JavaFX 2.0, then downloaded the SDK 2.2 JavaFX (beta) to see if it would make a difference - she didn't.
  
  Any ideas would be very appreciated.

  Hello

  My guess would be that NetBeans resumes still jars of JavaFX 2.0 instead of JavaFX 2.2

  I would say that play with the properties of your project: examine the library dependencies and the platform.
  If you use a Default_JavaFX_Platform then check where it picks up JavaFX (click on 'manage the platform' and look in the JavaFX tab).
  Sometimes, NetBeans is confused and will resume the 2.2 SDK with the 2.0 runtime - check if really all paths!

  Hopes this helps,

  -daniel

  Published by: daniel June 13, 2012 06:18

• Date confusion

  I have two date variables defined as follows:

  private var baseDate: Date = new Date();  April 12, 2010

  private var currentDate:Date = new Date();  April 12, 2010

  During the initialization of the application, I do the following dates:

  currentDate = baseDate;

  currentDate.date = (baseDate.date - baseDate.day);

  What is confusing to me, it's that this end of setting baseDate AND the currentDate at April 11, 2010, where I expect only the currentDate-April 11, 2010.

  I know I can do this:

  currentDate = Nouvelle_date (baseDate.fullYear, baseDate.month, baseDate.date - baseDay.day)

  but there are other areas where I need to put parts of dates based on other dates, and prefer not to create a new Date object each time. I could end up with hundreds of thousands during an interaction between users, and it's not clear to me whether or not they get cleaned up through the process of garbage collection, so I guess this is part 2 of the question, I generally try to avoid new... inside a function, because these things are created and never go away.

  The thing to remember here is that when you use

  currentDate = baseDate
  

  It's a reference assignment. In other work, the Date used to be referenced by currentDate is lost (except if it is referenced by other var), and that after this line of code the currentDate both var and baseDate refer to the exact same object.

  Therefore, once you have done so, any view that make you on currentDate will be baseDate. If you use the Date() constructor new whenever you want to keep two separate instances of Date.

  You can also use it to 'make the copy' of dates:

  currentDate = new Date( baseDate );
  

• Confused about the extension of the Sprite class

  Howdy-

  I learn programming with object oriented ActionScript and am confused about the class Sprite and OO in general.

  My understanding is that the Sprite class allows you to group a set of objects that you can manipulate all the objects at the same time.

  I explored the Open Flash Chart code and note that the main class extends the Sprite class:

  Base/public class extends Sprite {}

  What this lets you do?

  Also, on a related note, how to draw, say, a line once I extended?

  Without extend Sprite I could write:

  var graphContainer:Sprite = new Sprite();

  var newLine:Graphics = graphContainer.graphics;

  ...

  And it works very well. Once I have extend the Sprite class, I'm lost. How can I modify this code so that it still draws a line? I tried:

  var newLine:Graphics = this.graphics;

  My understanding is that since I extend the Sprite class, I should still be able to call its method chart (or property? I have no idea). But, he screams at me, saying "1046: Type was not found or is not a constant of compilation: graphs.»

  A number of things.

  First of all, I would not use this approach in your table constructor. Setting the width and height only makes sense if you adjust the width and height of the existing content, and the table (Sprite) does not at this time here. If you want to give the table a 'size', you could do it like this:

  public function Chart (width: Number, height: Number) {}
  This.Width = width;
  This.Height = height;
  put in a background invisible to this size:
  this.graphics.beginFill (0,0);
  this.graphics.drawRect (0,0,width,height);
  }

  There are other ways, including putting in a form or a Sprite of child as a child for the background so that clear will not erase the background of the chart. This way you could have properties for the background in your table class and update the background as a child DisplayObject instance... a few ideas to think to...

  Then, after that, your chart should be functional...

  Then back in your scenario, you could do this:

  import graphics. Table;

  Stop()

  var myNewChart:Chart = new Chart (300,200)
  myNewChart.render ();
  addChild (myNewChart)

• Adding objects to the stage & amp; Properties of the acceessing Stadium - I'm a bit confused...

  Hello
  
  I'm a bit confused about the programming of the display's two-pronged:
  
  A. What are the best way to add objects to the stage?
  B. how to access the properties of the step.
  
  I can make these two when the project is a 'Action Script Project', but I have a problem when it is a "Flex project" (for example a MXML file). See the attached files two questions included in the commentary to see exactly what I mean.
  
  
  A. What are the best way to add objects to the stage?
  =====================================
  
  In a project of action script which extends Sprite I can call him addChild()
  
  In a project MXML I add objects to the scene first, adding them to a UIComponent, then adding that the step.
  
  1 - is the best way to do it?
  
  In this doc: http://livedocs.adobe.com/flex/3/html/help.html?content=05_Display_Programming_02.html he says this quote from

  :
  Each SWF file has an ActionScript class associated with it, called the main class of the SWF file. When Flash Player opens a SWF file in an HTML page, Flash Player calls the constructor function for that class and the instance that is created (which is always a type of display object) is added as a child of the Stage object. The main class of a SWF file always extends the Sprite class

• Initialization of fields: constructors vs initializers

  I just thought I could do the wrong thing by using initializers to initialize the fields in the constructor instead. Of cause, I want to talk about DPL...
  I am used to do something like this:
  

  @Persistent
  class Compound
  {
     private final Map<Integer, Integer> elements = new HashMap<Integer, Integer>();
  
     private Compound() {} //dummy private default constructor to be used by BDB
  
     //actual constructor to be used in the code
     public Compound(int initialValue)
     {
       //some specific initialization...
       //e.g.:
       elements.add(initialValue, initialValue);
     } 
  }

  But thinking about what will be the BDB really when demarshaling the instance of the object, I came to the idea that it re - build the plan of the elements and forget the one I create carefully in the initializer of... In order to avoid the useless object instantiation I have to initialize the field in the constructor as follows:
  

  @Persistent
  class Compound
  {
     private final Map<Integer, Integer> elements;
  
     //dummy private default constructor to be used by BDB
     private Compound()
     {
       //now I have to assign something to elements field because it's final.. 
       // or just remove the *final* modifier???
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     } 
  
     //actual constructor to be used in the code
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       elements = new HashMap<Integer, Integer>()
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     } 
  }

  So my question is: is there a real difference between the approaches of the first and the second? Or I just thought the wrong way?...

  Hello

  Persistent fields cannot currently be final, since I place them by reflection after the construction of the object. So I'm a bit confused. You set the final fields and it works with I somehow get? You read and a paper trail?

  The second approach is better, without the final to avoid the redundant design of the hash table.

  -mark

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• Confused.  Try to understand the Photo app Syncing iCloud

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• I created a photo album that contains 60 photos.  Looking at this album in FCPX there are only 30 pictures inside.  First time this has happened... confused...

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