Chapter 13, Problem 1PC

Program Plan Intro

Scrollable Tax Calculator

Program plan:

• Import necessary packages.
• Create a class “SliderTaxCalc”,
  • Declare necessary object variables.
  • Define the constructor,
    • Call the method “setTitle()” to set the title.
    • Set the operation of the button when it is pressed.
    • Create labels with a name.
    • Create necessary text fields.
    • Make a text field read only by calling the method “setEditable()”.
    • Create a slider for input.
    • Call the method “setMajorTickSpacing()” to set the units between larger tick marks.
    • Call the method “setMinorTickSpacing()” to set the units between minor tick marks.
    • Call the method “setPaintTicks()” to paint the tick marks on a slider.
    • Call the method “setPaintLabels()” to paint the label on a slider.
    • Insert “ChangeListener” to the slider.
    • Create a first panel.
    • Add a label and text field to the first panel.
    • Create a second panel.
    • Add a label and slider to the second panel.
    • Create a third panel.
    • Add a label and text field to the third panel.
    • Set the layout.
    • Add the first panel to the “JFrame” content pane.
    • Add the second panel to the “JFrame” content pane.
    • Add the third panel to the “JFrame” content pane.
    • Display the frames.
  • Create a class “SliderListener” for handling events that are been created by the slider,
    • Define a method “stateChanged()”,
      • Declare the necessary variables.
      • Create object for “DecimalFormat” class.
      • Get the value from the slider and assign to the variable.
      • Get the value from a text field and assign to the variable.
      • Call the method “setText()” to set the value on the text field.
  • Define the “main()” function,
    • Call the constructor to display its window.