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.

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Chapter 24, 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.

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