Chapter 6, Problem 13PP

Program Plan Intro

Change the background color using applet

Program plan:

• Include necessary header files.
• Define the class “Background”.
  • Declare the necessary private variables.
  • Define the method “init()”.
    • Create a content pane.
    • Initially set the background color as white.
    • Create the objects for three buttons.
    • Add the action to these buttons.
    • Create a label.
    • Set the layout.
    • Add the buttons on the window screen.
    • Add a label on the window screen.
  • Define the “actionPerformed ()” method.
    • Create an object for “Container”.
    • If the action command is red, display the background as red.
    • If the action command is white, display the background as white.
    • If the action command is blue, display the background as blue.
    • Otherwise, display an error message.