Do you need to add unrealized methods?

Question

I am trying to add a listener to a close operation JFrame:

addWindowListener(new WindowListener() {
    @Override
    public void windowClosing(WindowEvent e) {
        setVisible(false);
    }
});

The fact is that Eclipse keeps telling me that I have to “add unrealized methods”, which I believe is getting from WindowListener. However, I am confused, why do you need to implement all these other methods if you only need to override them? And if I add all these other methods, but don’t put any content in them, for example.

@Override
public void windowActivated(WindowEvent e) {}

will the default behavior for this method be lost? Or will it only get more complicated if I write something inside the method?

Answer 1

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WindowAdapter WindowListener

addWindowListener(new WindowAdapter() {
    @Override
    public void windowClosing(WindowEvent e) {
        setVisible(false);
    }
});

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PS: . . MouseAdapter, KeyAdapter

Answer 2

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Adapter : , , .

WindowListener WindowAdapter. , WindowListener ( ) WindowAdapter , .

Answer 3

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