Question

When defining nested classes, is it possible to access the “outer” class’ methods? I know it’s possible to access its attributes, but I can’t seem to find a way to use its methods.

    addMouseListener(new MouseAdapter() {
        @Override
        public void mouseClicked(MouseEvent e) {
            if (e.getClickCount() == 2 && //<-- Here I'd like to
        }                                 // reference a method
    });                                   //from the class where
                                          //addMouseListener() is defined!

Thanks

Answer 1

As your inner class is non-static, all methods of the outer class are automatically visible to the inner class, even private ones.

So, just go ahead and call the method that you want.

For example,

   class MyClass extends JPanel
   {

        void doStuff()
        {
        }

        boolean someLogic()
        {
           return 1>2;
        }

        void setupUI() 
        {
            addMouseListener(new MouseAdapter() {
               @Override
               public void mouseClicked(MouseEvent e) {
                 if (e.getClickCount() == 2 && someLogic())
                   doStuff();
               }
            });                                
        }
    }                                       

For more on this, see the Sun Tutorial on Nested Classes.