MouseListener Interface

mouseEntered( ) , mouseExited( ) ,mousePresse().

This interface defines five methods. If the mouse is pressed and released at the
same point, mouseClicked( ) is invoked. When the mouse enters a component, the
mouseEntered( ) method is called. When it leaves, mouseExited( ) is called. The
mousePressed( ) and mouseReleased( ) methods are invoked when the mouse is
pressed and released, respectively.

The general forms of these methods are shown here:
void mouseClicked(MouseEvent me)
void mouseEntered(MouseEvent me)
void mouseExited(MouseEvent me)
void mousePressed(MouseEvent me)
void mouseReleased(MouseEvent me)