Chapter 6, Problem 19PP

Program Plan Intro

Checker board

Program plan:

• Create a class “CheckerB”,
  • Declare the necessary variables.
  • Define the constructor to assign initial values.
  • Define the function “draw()”,
    • Create object for “Graphics2D” class.
    • Create outer “for” loop to iterate over number of squares.
      • Create inner “for” loop to iterate over number of squares.
      • Check the condition,
        • If the condition is true, Create object for “Rectangle” class.
        • Fill the graphics rectangle.
• Create a class “CheckerBViewer”,
  • Define “main()” function,
    • Create an object for “JFrame” class.
    • Initialize the necessary variables.
    • Set the size, title, and close operation for the frame.
    • Define “JComponent” constructor.
      • Define “paintComponent()”,
        • Initialize the variable.
        • Calculate the size.
        • Call the constructor “CheckerB()” to create object.
        • Call “draw()” method to draw the squares.
    • Add the component into the frame.
    • Make the frame visible.