How can I send back an action from the called calss to the calling class?

Assumed the calling calss is class A and the called class is class B. My code looks as follow:

...
class A{
...
B b = new B();
...
...
  do_somework_if_classB_action();
...
}

class B{
...
  protected void dosomework(){
    this.addActionListener(){
      callback_classA();
    }
  }
...
}

How can class A catch the action from class B?

chenweiAsked:
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chenweiAuthor Commented:
maybe should I set á listener to listen to the called class B?
0
chenweiAuthor Commented:
more details:

the calling class A is JDesktopPane, the called class B is JIternalFrame. Everytime if a JInternalFrame is closed, the calling class A should know which one is closed.
0
sciuriwareCommented:
Easy, A will keep track of all created B's and put them in an ArrayList.
Every time a B closes it calls A.amClosing(this) method ; A can identify the argument (this) as
stored in the ArrayList.
<*>
0

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