Chapter 11, Problem 5PE

Program Plan Intro

Combo box

Program plan:

ThreeComboBox.java

• Create a class named “ThreeComboBox”. Inside the class,
  • Define the required components.
  • Set the width and height of the frame.
  • Define the constructor “ThreeComboBox ()”.
    • Set the size of the frame.
    • Create an object for panel.
    • Set the layout.
    • Call the method “createControlPanel()”.
  • Definition of method “createControlPanel ()”.
    • Create the combo box for Red, Green and blue constraints.
    • Definition of class “ColorListener”.
    • Definition of method “actionPerfromed”.
    • Create an object for color.
    • Set the color.
    • Check the color chosen equals to red.
      • Set the color to red.
        • Check the color chosen equals to green.
        • • Set the color to green.
        • Check the color chosen equals to blue.
        • • Set the color to blue.
        • Set the background color.
  • Create an object for “ColorListener”.
  • Create an object for panel.
  • Add the combo box to the frame.
  • Add the border layout.

ThreeColorsViewer.java

• Create a class named “ColorsViewer”. Inside the class,
  • Definition of “main()” method
    • Create an object for frame.
    • Close the frame.
    • Set the title for frame.
    • Set the visibility.