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Java-topic-InnerClass

In java there are two kinds of inner classes, one is local class and another is anonymous class.

Anonymous class is like local class, but it is a expression while local class is itself, a declaration.

With Anonymous class we can define and instantiate a class at the same time.

For example when a method requires an object of type an interface, we can use an anonymous class instead of implementing the mothod ( in the interface ) with a new class.

public final void setOnAction ( EventHandler< ActionEvent> value )

btn.setOnAction( new EventHandler< ActionEvent>() {
    @override
    public void OnAction(ActionEvent evevnt) {
        // Something with event    
    }
});

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