ThreeButtons Class Diagram

ThreeButtons Class Specification

Notes

This class is designed to be inherited. The inheriting class should instantiate an object, call it window, of type ThreeButtonFrame (this type is also inherited).

window is a JFrame with the following initial configuration:

- window's upper left corner at (20, 20).

- window has a width of 600 and height of 500

- Three buttons are arrayed along the bottom of window. The names of the buttons are LEFT MID and RIGHT.

Event Handler Methods

public abstract void leftAction( )

note: This method is called whenever window's LEFT button is clicked. The class inheriting ThreeButtons must override this method.

public abstract void midAction( )

note: This method is called whenever window's MID button is clicked. The class inheriting ThreeButtons must override this method.

public abstract void rightAction( )

note: This method is called whenever window's RIGHT button is clicked. The class inheriting ThreeButtons must override this method.