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.