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Class cs005.event.ButtonListener

java.lang.Object
   |
   +----cs005.event.ButtonListener

public abstract class ButtonListener

extends Object

implements ActionListener

This is the class used for making Buttons work! It implements the java.awt.event.ActionListener interface, which has only one method, actionPerformed. This method gets called every time the button that the Listener is "listening to" is pressed. This method in turn calls the buttonClick method, which is abstract and to be filled in in a subclass.

How To Use: Subclass off of ButtonListener, filling in the abstract method buttonClick with the code that you want to be executed when the button is clicked.
Pass your ButtonListener into the Button's addActionListener() method. For example:
myButton.addActionListener(myListener); where myButton is an instance of java.awt.Button and myListener is an instance of a subclass of ButtonListener.

ButtonListener(Applet)

Constructor: ButtonListener
This is the constructor used to create a ButtonListener.

actionPerformed(ActionEvent)

Method: actionPerformed()
This is the method from the java.awt.event.ActionListener method.

buttonClick()

Method: buttonClick()
This is the method that you should fill in in the subclasses.

 public ButtonListener(Applet app)

Constructor: ButtonListener
This is the constructor used to create a ButtonListener. The ButtonListener will be inactive until you pass it to a button using the button's addActionListener() method.

Parameters:

app - The Applet

 public void actionPerformed(ActionEvent e)

Method: actionPerformed()
This is the method from the java.awt.event.ActionListener method. You should not need to alter this method in any way in the subclasses. If you do be sure to call super.actionPerfomed(e) in order to make sure that the buttonClick() method is actually called. You should not need to call this method. Ever.

Parameters:

e - the ActionEvent that occurred.

 public abstract void buttonClick()

Method: buttonClick()
This is the method that you should fill in in the subclasses. This method gets called every time the button that the Listener is "listening to" is pressed. You do not need to call this method yourself. It is called automatically for you. This is where you should put the code that is to be executed every time the buttons are clicked.

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