Draw a circle with two mouse presses Program plan: In a file “CircleDrawerFrame.java”, import the necessary packages and create a class “CircleDrawerFrame”, Declare the object “CircleDrawerComponent”. Declare the object “Point2D”. Initialize the frame width and height. Define the constructor, Create the object “CircleDrawerComponent”. Initialize the maximum click. Create the object “Point2D”. Create a class “MousePressedListener”, Define the method “mousePressed()”, Check whether the click is greater than the maximum click, If it is true, return nothing. Assign the value obtained from “getX()”, and “getY()”. Fill the array. Increment the click. Check whether the click is equal to the maximum click, If it is true, Assign the value obtained from “getX()”, and “getY()”. Calculate the circle’s radius. Call the method “setPositionAndSize()”. Set the click to “0”. Define do-nothing method “mouseReleased ()”. Define do-nothing method “mouseClicked ()”. Define do-nothing method “mouseEntered ()”. Define do-nothing method “mouseExited()”. Create the object for “MousePressedListener”. Call the method “addMouseListener()”. Set the size. Add the component. In a file “CircleDrawerComponent.java”, import necessary packages, and create a class “CircleDrawerComponent”, Declare the necessary variables. Define the constructor. Define the method “setPositionAndSize ()” that sets the “x”, “y”, and “radius”. Define the method “paintComponent ()”, Call the super class method. Create “Graphics2D” object. Create “Ellipse2D” object. Call the method “draw()”. Call the method “repaint()”. In a file “CircleDrawerView.java”, import necessary package, and create a class “CircleDrawerView”, Define the “main()” method. Create “JFrame” object. Set the frame title. Set the operation on the frame. Make the frame visible.

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Chapter 11, Problem 9PP

Program Plan Intro

Draw a circle with two mouse presses

Program plan:

In a file “CircleDrawerFrame.java”, import the necessary packages and create a class “CircleDrawerFrame”,

Declare the object “CircleDrawerComponent”.

Declare the object “Point2D”.

Initialize the frame width and height.

Define the constructor,

Create the object “CircleDrawerComponent”.

Initialize the maximum click.

Create the object “Point2D”.

Create a class “MousePressedListener”,

Define the method “mousePressed()”,

Check whether the click is greater than the maximum click,

If it is true, return nothing.

Assign the value obtained from “getX()”, and “getY()”.

Fill the array.

Increment the click.

Check whether the click is equal to the maximum click,

If it is true, Assign the value obtained from “getX()”, and “getY()”.

Calculate the circle’s radius.

Call the method “setPositionAndSize()”.

Set the click to “0”.

Define do-nothing method “mouseReleased ()”.

Define do-nothing method “mouseClicked ()”.

Define do-nothing method “mouseEntered ()”.

Define do-nothing method “mouseExited()”.

Create the object for “MousePressedListener”.

Call the method “addMouseListener()”.

Set the size.

Add the component.

In a file “CircleDrawerComponent.java”, import necessary packages, and create a class “CircleDrawerComponent”,

Declare the necessary variables.

Define the constructor.

Define the method “setPositionAndSize ()” that sets the “x”, “y”, and “radius”.

Define the method “paintComponent ()”,

Call the super class method.

Create “Graphics2D” object.

Create “Ellipse2D” object.

Call the method “draw()”.

Call the method “repaint()”.

In a file “CircleDrawerView.java”, import necessary package, and create a class “CircleDrawerView”,

Define the “main()” method.

Create “JFrame” object.

Set the frame title.

Set the operation on the frame.

Make the frame visible.

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