title: Java child object inherited from Thread object should invoke methodexecution of parent object in main(ui) thread
body: <p>It is me again, and I am pretty stuck with porting some code from c# to java.
  As I now read, there are two main-ways in order to use multithreading in java.
  There is the creation of a class, which inherits from thread, or the creation of a class, which implements Runnable.
  (There is also the anonymous approach, I know ).</p>
  
  <p>As I now painfully had to recognize, that porting the multithreading from c# to java could get me to refactor some of my code ( which I would like to avoid as much as possible) .</p>
  
  <p>So, let me say, I have a class CLQueueWorker inheriting from Thread. My parent object (_oParentMAIN ) will keep a reference of this object.</p>
  
  <p>It's "run" method SHOULD do some asynch actions ( which until now are all implemented in _oParentMAIN):</p>
  
  <p>1) dequeue some data from an object, which was filled (and is maintained) in _oParentMAIN -->(my idea is now to create a static variable in CLQueueWorker, and work with this instead of
  keeping it in the _oParentMAIN).</p>
  
  <p>2) invokes a method-call on ui thread --> Do not know, how to refactor this, because until now
     This method is a member of _oParentMAIN and I will not be able to invoke its call on 
     the ui thread, because CLQueueWorker does not know this member).</p>
  
  <p>3) invokes another method on ui thread, which is responsible for ui-elements. --> here my problems also will be the same as in point 2.</p>
  
  <p>So, I need some hints how to redesign this in the appropriate way.
  Let me say, is it possible, that CLQueueWorker (which really spawns another thread) calls methods/throws events to/of _oParentMAIN AND PASSES EXECUTION BACK INTO MAIN thread ?</p>
  
  <p>I hope, I could describe it clearly enough.</p>