All Packages  Class Hierarchy  This Package  Previous  Next  Index

Class programming101.calculator.PlusButton 

java.lang.Object
    |
    +----java.awt.Component
            |
            +----java.awt.Button
                    |
                    +----programming101.calculator.CalculatorButton
                            |
                            +----programming101.calculator.PlusButton
public class PlusButton
extends CalculatorButton
Does calculator addition and subtraction. Handles windowing system button click events directly.

Since:
15/03/98
Version:
1.0 (15/03/98)
Author:
© 1998 Peter T. Sander

Constructor Index

o PlusButton(Calculator)
Constructor.

Method Index

o actionPerformed(ActionEvent)
Handles windowing system button click events.

Constructors

o PlusButton 
public PlusButton(Calculator calculator)
Constructor.

Parameters:
calculator - reference to calculator using this button

Methods

o actionPerformed 
public final void actionPerformed(ActionEvent ae)
Handles windowing system button click events. Basically adds value in the entry field to current accumulator value.

Parameters:
ae - action event fired by the windowing system
Overrides:
actionPerformed in class CalculatorButton
All Packages  Class Hierarchy  This Package  Previous  Next  Index