EBK BIG JAVA: EARLY OBJECTS, INTERACTIV
EBK BIG JAVA: EARLY OBJECTS, INTERACTIV
6th Edition
ISBN: 8220102010314
Author: Horstmann
Publisher: YUZU
Question
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Chapter 20, Problem 7PE
Program Plan Intro

Rectangle

Program plan:

RandomRectanglesFrame.java:

  • Create a class named “RandomRectanglesFrame”. Inside the class,
    • Define the required components.
    • Set the width and height of the frame.
    • Define the required varaibles.
    • Define the “RandomRectanglesFrame ()” method.
      • Set the frame size
      • Define the panel
      • Add the components to the frame
      • Create the control panel.
    • Define the “createControlPanel ()” method.
      • Define the button.
      • Add the button to the panel.
      • Position the components
      • Set the rectangle value based on the button action.
    • Define the “makeButton ()” method.
      • Define the button.
      • Define the class “ButtonListener”,
        • Define the method action performed.
          • Calculate the count
        • Define the listener
        • Add the action listener
        • Return the button.

RectangleComponent.java:

  • Create a class named “RectangleComponent”. Inside the class,
    • Define and declare the required variables.
    • Define the method “paintComponent”
      • Create the 2d graphics object
      • Generate the random rectangles
      • Loop that iterates for creating the rectangle
    • Define the method “setRectCount”
      • Assign the count value
      • Call the method to draw

RandomRectanglesViewer.java:

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

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