I want to perform some action when a mouse is over JMenuItem. What listener should I use?

开发者_JAVA技巧

I want to perform some action when a mouse is over JMenuItem. What listener should I use?

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Use MouseListener. Its method mouseEntered() and mouseExited() will be helpful to you.

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and alternative is

    menuItem1.getModel().addChangeListener(new ChangeListener() {

        @Override
        public void stateChanged(ChangeEvent e) {
            ButtonModel model = (ButtonModel) e.getSource();
            if (model.isRollover()) {
                // some stuff
            }// may be another states from ButtonModel
        }
    });

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If 'some action' happens to be 'show a message', look at JComponent.setToolTipText(String).