Chapter 8, Problem 9PP

Program Plan Intro

A Window interface derived from JFrame

Program plan:

• Include necessary header files.
• Define the class “ButtonDemo”.
  • Declare the necessary private variables.
  • Define the constructor.
    • Set the window size.
    • Create an object for “WindowDestroyer” class.
    • Add the listener.
    • Create an object for “Container” class.
    • Initially set the background color as white.
    • Set the layout.
    • Create the button.
    • Add the action to this button.
    • Add a button on the window screen.
    • Set the values.
  • Define the “paint()” method.
    • Call the “paint” method.
    • Check if the “sky” is equal to “SUNNY”.
      • Call the method “drawOval()” to draw the face.
      • Draw the left and right eye using “fillOval” method.
      • Draw a mouth using “drawArc” method.
        • Check if the “sky” is equal to “CLOUDY”.
        • • Call the method “drawOval()” to draw the face.
          • Draw the left and right eye using “fillOval” method.
          • Draw a mouth using “drawArc” method.
  • Define the “actionPerformed ()” method.
    • Declare the required variables.
    • Increment the value.
    • If the action is “Sunny”, then execute the “if” loop,
      • Set the background as pink after clicking the button.
      • Hide the sunny button on the window screen.
      • Show the cloudy button on the window screen.
        • If the action is “Cloudy”, then execute the “if” loop,
        • • Set the background as gray after clicking the button.
          • Show the sunny button on the window screen.
          • Hide the cloudy button on the window screen.
        • Otherwise, display error message.
        • If the “clickCount” greater than “MAX_CLICKS”, exit the program
        • If the “clickCount” greater than “MAX_CLICKS - 1”, display the statement.
        • Call the “repaint” method.