MouseEntered and KeyPressed at Same Time Java Swing

Question

Using Java Swing I have 20 JLabels. Each JLabel has a MouseListener and a KeyListener. I\'m been trying to come up with a way

Answer 1

In the top of your class:

private JLabel hoveredLabel;

When adding a JLabel:

final JLabel label = ...

label.addMouseMotionListener(new MouseListener() {
    ...

    public void mouseEntered(MouseEvent me) {
        hoveredLabel = (JLabel)me.getSource();
    }

    public void mouseExited(MouseEvent me) {
        hoveredLabel = null;
    }
}

And your KeyListener:

public void keyPressed(KeyEvent e) {
    if(e.getKeyCode() == KeyEvent.VK_DELETE){
        //Get the JLabel that the mouse has entered/hovering over
        //Perform action on that JLabel
        if (hoveredLabel != null)
            doSomethingWith(hoveredLabel);
    }
}

Make sure you add the KeyListener to the contentPane of the JFrame.