To implement a modified version of “Exercise E20.1” Program plan: In the file “ ThreeColorsFrame.java ”, create a class “ ThreeColorsFrame” that creates a frame that contains a panel that displays one of three colors specified by the user, Declare necessary variables. Define default constructor. Define the method “createControlPanel()” to create the control panel with buttons at the bottom of the frame. Define the method “makeButton()” to make a button to change the color of the panel. In the file “ ThreeColorsViewer.java ”, create a class “ ThreeColorsViewer”, Define the “main()” method, Create an object for “ThreeColorsFrame”. Set the fame to exit on close. Set the frame’s title. Make the frame visible.

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Chapter 20, Problem 2PE

Program Plan Intro

To implement a modified version of “Exercise E20.1”

Program plan:

In the file “ThreeColorsFrame.java”, create a class “ThreeColorsFrame” that creates a frame that contains a panel that displays one of three colors specified by the user,

Declare necessary variables.

Define default constructor.

Define the method “createControlPanel()” to create the control panel with buttons at the bottom of the frame.

Define the method “makeButton()” to make a button to change the color of the panel.

In the file “ThreeColorsViewer.java”, create a class “ThreeColorsViewer”,

Define the “main()” method,

Create an object for “ThreeColorsFrame”.

Set the fame to exit on close.

Set the frame’s title.

Make the frame visible.

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