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  • Priority: Medium
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Creating new threads from a static context

Hi all,

My application has an abstract utility class which makes sounds.  It does this via static accessor methods like this:

public static void playError() {
  playSound(ERROR);
}

This is fine, but I want some of these methods to play the sound in a new thread, something like this:

public static void playClick() {
  playThreadSound(CLICK);
}

private static void playThreadSound( URL CLICK) {
  // ---- This won't work, trying to create instance from a static context!
  SoundThread thread = new SoundThread(CLICK);    
  thread.start();
}

Can anyone show me how to get the functionality I require, without having to create an instance of my Utility class?  Is what I'm trying to do sensible?
0
agrees
Asked:
agrees
2 Solutions
 
zzynxSoftware engineerCommented:
Make your Utiltity class like:

public class Utility {
   private static Utility theInstance = null;

   private static Utility getInstance() {
       if (theInstance==null)
          theInstance = new Utility();
       return theInstance;
   }
 
   public static void playError() {
         playSound(ERROR);
   }
}

now from a static context you can call:

     Utility.getInstance().playError();
0
 
agreesAuthor Commented:
Bingo, just what I was after, thanks zzynx!

I'll give it a bit just in case anyone wants to argue a better way, then give you the points! :)
0
 
zzynxSoftware engineerCommented:
OK :)
0
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CEHJCommented:
Just create a Thread in one of your static methods:


public static void playThreadSound(final URL click) {
      Thread playerThread = new Thread(new Runnable() {
            public void run() {
                  playSound(click);
      
            }    
      });
      playerThread.start();
}
0
 
objectsCommented:
>   // ---- This won't work, trying to create instance from a static context!

you can create an instance from a static context (unless it is an inner class).
If it is an inner class then either move it from being an inner class or make it static (the class that is).

0
 
zzynxSoftware engineerCommented:
Thank you
0
 
CEHJCommented:
8-)
0

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