How to judge the mouse enter which one of buttons?

There two buttons(no text,only icon on them),
and how to judge the mouse enter which one of
them and show the different message at one textfield?

Try this. I don't know if the code works, but the true solution will be like it.
void mouseClicked(MouseEvent e)
    int mask = e.getModifiers();
    if((mask & InputEvent.BUTTON1_MASK) != 0)
        System.out.println("You touched to the button 1!");
    else if((mask & InputEvent.BUTTON2_MASK) != 0)
        System.out.println("You touched to the button 2!");
    else if((mask & InputEvent.BUTTON3_MASK) != 0)
        System.out.println("You touched to the button 3.");
}Ghys

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