Java Mouse Events | NetBeans
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Interface
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MouseListener

Methods
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mouseClicked() - Invoked when the mouse button has been clicked (pressed and released) on a component.
mouseEntered() - Invoked when the mouse enters a component.
mouseExited() - Invoked when the mouse exits a component.
mousePressed() - Invoked when a mouse button has been pressed on a component
mouseReleased()- Invoked when a mouse button has been released on a component.