Polygon Program plan: Filename: “JFrame.java” This program file is used to define a class “JFrame”. In the code, Import the required packages. Define a class “JFrame”. Declare class members “size”, “components”. Define a constructor “setSize”. Initialize the class members. Define a method “setDefaultCloseOperation()”. Define a method “add()”. Define a method “setVisible()”. Define string. Declare variable rect. Define graphics and then set the properties. Inside the try statement, Declare string extension. Inside the catch statement, Print the statement. Filename: “PolygonComponent.java” This program file is used to define a class “PolygonComponent”. In the code, Import the required packages. Define a class “PolygonComponent”. Declare the class members “polygon”. Define a method “PolygonComponent()”. Define “ploygon”. Define a method “paintComponent()”. Define Graphics2D “g2”. Filename: “PolygonParser.java” This program file is used to define a class “PolygonParser”. In the code, Import the required packages. Define a class “PolygonParser”. Declare the class members “builder”, “path”. Define the constructor “PolygonParser()”. Declare DocumentBuilderFactory “factory”. Declare “builder”. Declare XPathFactory “xpfactory”. Declare “path”. Define a method “parse()”. Declare file “f”. Declare Document “doc”. Define statement “points”. Inside the for loop, Define variables “x”, “y”. Filename: “PolygonViewer.java” This program file is used to define a class “PolygonViewer”. In the code, Import the required packages. Define a class “PolygonViewer”. Define class main. Define PolygonParser “rp”. Define PolygonComponent “ellipsecomponent”. Define JFrame “frame”. Filename: “polygon.xml” This program file is used to define an XML file “polygon”. In the code, Open the polygon tag. Open the point tag. Create an element named “x”. Create an element named “y”. Close the point tag. Open the point tag. Create an element named “x”. Create an element named “y”. Close the point tag. Open the point tag. Create an element named “x”. Create an element named “y”. Close the point tag. Open the point tag. Create an element named “x”. Create an element named “y”. Close the point tag. Open the point tag. Create an element named “x”. Create an element named “y”. Close the point tag. Close the polygon tag.

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Chapter 24, Problem 9PP

Program Plan Intro

Polygon

Program plan:

Filename: “JFrame.java”

This program file is used to define a class “JFrame”. In the code,

Import the required packages.

Define a class “JFrame”.

Declare class members “size”, “components”.

Define a constructor “setSize”.

Initialize the class members.

Define a method “setDefaultCloseOperation()”.

Define a method “add()”.

Define a method “setVisible()”.

Define string.

Declare variable rect.

Define graphics and then set the properties.

Inside the try statement,

Declare string extension.

Inside the catch statement,

Print the statement.

Filename: “PolygonComponent.java”

This program file is used to define a class “PolygonComponent”. In the code,

Import the required packages.

Define a class “PolygonComponent”.

Declare the class members “polygon”.

Define a method “PolygonComponent()”.

Define “ploygon”.

Define a method “paintComponent()”.

Define Graphics2D “g2”.

Filename: “PolygonParser.java”

This program file is used to define a class “PolygonParser”. In the code,

Import the required packages.

Define a class “PolygonParser”.

Declare the class members “builder”, “path”.

Define the constructor “PolygonParser()”.

Declare DocumentBuilderFactory “factory”.

Declare “builder”.

Declare XPathFactory “xpfactory”.

Declare “path”.

Define a method “parse()”.

Declare file “f”.

Declare Document “doc”.

Define statement “points”.

Inside the for loop,

Define variables “x”, “y”.

Filename: “PolygonViewer.java”

This program file is used to define a class “PolygonViewer”. In the code,

Import the required packages.

Define a class “PolygonViewer”.

Define class main.

Define PolygonParser “rp”.

Define PolygonComponent “ellipsecomponent”.

Define JFrame “frame”.

Filename: “polygon.xml”

This program file is used to define an XML file “polygon”. In the code,

Open the polygon tag.

Open the point tag.

Create an element named “x”.

Create an element named “y”.

Close the point tag.

Open the point tag.

Create an element named “x”.

Create an element named “y”.

Close the point tag.

Open the point tag.

Create an element named “x”.

Create an element named “y”.

Close the point tag.

Open the point tag.

Create an element named “x”.

Create an element named “y”.

Close the point tag.

Open the point tag.

Create an element named “x”.

Create an element named “y”.

Close the point tag.

Close the polygon tag.

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