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Oh yeah :)

As an ActionListener is an interface, how can i add an instance of this? Because interfaces cant be instantiated can they.

... i am adding the method actionPerformed to the fileItem object, and whenever an action occurs on this object the actionPerformed method is called?

I know that :), i couldnt be bothered to write it all out. So by writing:

"fileItem.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){
code....
}...

So when I do "fileItem.addActionListener(new ActionListener(){});", I am adding a method named "actionPerformed" to the fileItem object?

Ahh I get what your saying.

I have looked up interfaces. Are interfaces similar to classes except they they only contain empty methods?