Program to remove the first largest ball Program plan: Import the required packages into the program. In the Exercise20_09 class, In start() method, Create an object for buttons and HBox. Call addAll() method to add all buttons. Set the action adds or remove a ball. Pause and restart animation. Scroll bar used to control speed of animation. Set the maximum speed. Create a scene, put it into pane in stage, and display the stage. Define the MultipleBallPane class, Define the add() method to add the ball. Define the subtract() method to subtract the ball. Define the play() method to play the ball. Define the pause() method to pause the ball. Define the increaseSpeed() method to increase the speed. Define the decreaseSpeed() method to decrease the speed. Define the DoubleProperty() method to return the rate property. Define the moveBall() method to adjust the ball position and identify the collision. In the Ball class extends the Circle class. Declare the required variables. Define compareTo() method to return the value. In the main() method, Launch the project.

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Chapter 20, Problem 20.9PE

Program Plan Intro

Program to remove the first largest ball

Program plan:

Import the required packages into the program.

In the Exercise20_09 class,

In start() method,

Create an object for buttons and HBox.

Call addAll() method to add all buttons.

Set the action adds or remove a ball.

Pause and restart animation.

Scroll bar used to control speed of animation.

Set the maximum speed.

Create a scene, put it into pane in stage, and display the stage.

Define the MultipleBallPane class,

Define the add() method to add the ball.

Define the subtract() method to subtract the ball.

Define the play() method to play the ball.

Define the pause() method to pause the ball.

Define the increaseSpeed() method to increase the speed.

Define the decreaseSpeed() method to decrease the speed.

Define the DoubleProperty() method to return the rate property.

Define the moveBall() method to adjust the ball position and identify the collision.

In the Ball class extends the Circle class.

Declare the required variables.

Define compareTo() method to return the value.

In the main() method,

Launch the project.

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