Chapter 25, Problem 11PP

Program Plan Intro

  Execution of “Exercise P25.10”, using a DTD for validation

Program plan:

• In the file “Message.java”, import necessary packages, and create a class “Message”,
  • Declare necessary variables.
  • Define the constructor.
  • Define the method “getShape()”that gets the shape that draws the message.
• In the file “DrawingComponent.java”, import necessary packages, and create a class “DrawingComponent”,
  • Declare an “ArrayList”.
  • Define the constructor that constructs a drawing component.
  • Define the method “paintComponent()” to draw the component.
• In the file “DrawingParser.java”, import necessary packages, and create a class “DrawingParser”,
  • Declare necessary instance variables.
  • Define the constructor.
  • Define the method “parse()” that parses an XML file containing a drawing.
• In the file “DrawingViewer.java”, import necessary packages, and create a class “DrawingViewer”,
  • Define the method “main()”,
    • Create an object for “DrawingParser”.
    • Get input arguments using “parse()”.
    • Create an object for “DrawingComponent”.
    • Create an object for “JFrame”.
    • Make the frame exit on close.
    • Add the component into the frame.
    • Set the frame size.
    • Make the frame visible.