Chapter 7, Problem 25PP

Program Plan Intro

Pie chart

Program plan:

• In a file “PieChart.java”, import necessary packages and create a class “PieChart”,
  • Declare necessary variables.
  • Declare “ArrayList” object.
  • Define the constructor,
    • Set the initial values for width and height.
    • Create “ArrayList”.
  • Define a method “add()”,
    • Call the method “add()” .
  • Define a method “draw()”,
    • Declare and initialize necessary variable.
    • Create a loop,
      • Calculate the total value.
        • Assign the values for “x_width”, and “x_height”.
        • Compute radius.
        • Call the method “draw()”.
        • Create “Point2D” object.
        • Initialize the angle “0”.
        • Create a loop,
        • • Compute angle.
          • Create “Point2D” object.
          • Call the method “draw()”.
• In a file “ChartViewr.java”, import necessary packages and create a class “ChartViewr”,
  • Define the method “main()”,
    • Create the object for “JFrame”.
    • Declare and initialize the frame width and height.
    • Set the frame size.
    • Set the frame title.
    • Set the operation on frame.
    • Create object for “JComponent”,
      • Define the method “paintComponent()”,
        • Construct an object for “Graphics2D”.
        • Construct an object for “BarChart”.
        • Call the method “add()” with “1.1” as an argument.
        • Call the method “add()” with “3.6” as an argument.
        • Call the method “add()” with “4.0” as an argument.
        • Call the method “add()” with “3.7” as an argument.
        • Call the method “add()” with “2.1” as an argument.
        • Call the method “add()” with “2.7” as an argument.
        • Call the method “add()” with “2.6” as an argument.
        • Call the method “draw()”.
    • Add the component to the frame.
    • Make the frame visible.