Question

I’ve made a array full of JLabels and would like to add a listener to them.

The listener doesn’t need to know exactly which one was clicked on, just that one was.
Is there a way to add the listener to the whole array instead of using a ‘for()’ loop ?

Thanks for reading.

Answer 1

If your labels are added a to a container ( like a JPanel ) you can add a listener to this container and know which component is at certain location.

JPanel panel = new JPanel();
panel.addMouseListener( whichOneListener );
f.setContentPane( panel );

In this case I use a mouseListener because that give me the location where the user clicked.

private static MouseListener whichOneListener = new MouseAdapter() {
    public void mouseClicked( MouseEvent e ) {
        JComponent c = ( JComponent ) e.getSource();
        JLabel l  = ( JLabel ) c.getComponentAt( e.getPoint() );
        System.out.println( l.getText() );
    }

};

And prints correctly what component was clicked.

The full source code is here