Chapter 6: Inheritance and Abstract Classes Chapter Topics 6.1 ...

CS151 Object-Oriented Design
Dr. Kim
}
public void mousePressed(MouseEvent event) {}
public void mouseReleased(MouseEvent event) {}
public void mouseEntered(MouseEvent event) {}
public void mouseExited(MouseEvent event) {}
• To define a listener, extend these adapter classes and override only methods you want.
Without an adapter class, you need to supply all five methods inside a listener class.
• Use an anonymous class to define the mouse listener. The following anonymous listener
class extends MouseAdapter rather than implementing MouseListener.
addMouseListener(new
MouseAdapter()
{
public void mousePressed(MouseEvent event)
{
mouse action goes here
}
});
The above code is equivalent to
class X extends MouseAdapter
{ public void mousePressed(MouseEvent event)
{
mouse action goes here
}
}
addMouseListener(new X());
Example: Car Mover Program
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