Chapter 20, Problem 5PE

Program Plan Intro

ThreeColorsComboBoxFrame

Program plan:

ThreeColorsComboBoxFrame.java:

• Create a class named “ThreeColorsComboBoxFrame”. Inside the class,
  • Define the required components.
  • Set the width and height of the frame.
  • Define the “ThreeColorsComboBoxFrame ()” method.
    • Set the frame size
    • Define the panel
    • Add the components to the frame
    • Create the control panel.
  • Define the “createControlPanel ()” method.
    • Define the color combo box.
    • Add the item
    • Set the background color.
  • Define the class “ColorListener ()” and inside,
    • Define the action listener method.
      • Set the initial color.
      • Validate and assign the colors.
      • Add the colors to the background.
      • Create a panel and position them.

ThreeColorsViewer.java

• Create a class named “ThreeColorsViewer”. Inside the class,
  • Define the “main()” method
    • Define the frame
    • Set the close operation
    • Set the title
    • Set the visibility.