Chapter 18, Problem 18.35PE

Program Plan Intro

H-tree fractal

Program Plan:

• Import required packages.
• Declare a main class named “E35” which extends the “Application” class.
  • Declare a “start ()” method which overrides the “start ()” method in the “Application” class. Inside this method,
    • Create a pane and a text field.
    • Set the action listener for the text field.
    • Set the value of the property.
    • Set the text field at the bottom right.
    • Create a label and add the text field object to the pane.
    • Create a border pane.
    • Create a scene and place it on the stage.
    • Set the title as “Exercise18_35”.
    • Display the stage on the window using “primaryStage.show()” method.
    • Set the width and height property.
  • Declare a class named “HPane”.
    • Declare a variable.
    • Give function definition to set new order.
      • Set the order of the tree.
      • Call the function “paint ()”.
    • Give function definition for “paint ()”.
      • Calculate the width and height.
      • Calculate the length.
      • Clear the pane using “clear ()” method. Call the function “displayHTree ()”.
    • Give function definition for “displayHTree ()”.
      • Choose four end points.
      • Create three lines.
      • Check if the value of “treeOrder” is greater than 0.
        • Call the function recursively.
  • Declare a main method using “public static main”.
    • Launch the method using “launch ()” method.