Java programming. Please, could you add the comment so I can follow and understa

Question

Java programming.

Please, could you add the comment so I can follow and understand. Thanks

Create a program with JavaFX that displays a bouncing graphics (an image of a ball or the head of Darth Vader or anything else). The object should bounce around in the window. There should also be a button in the win- dow that releases another object (unlimited number should be possible to have in the window, but only one new object should be released for each press of the button). The objects must also bounce on each other when the program is running.

Explanation / Answer

package learn.javafx; import javafx.animation.KeyFrame; import javafx.animation.Timeline; import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Bounds; import javafx.scene.Scene; import javafx.scene.layout.Pane; import javafx.scene.paint.Color; import javafx.scene.shape.Circle; import javafx.stage.Stage; import javafx.util.Duration; public class GamePractice extends Application { public static Circle circle; public static Pane canvas; @Override public void start(final Stage primaryStage) { canvas = new Pane(); final Scene scene = new Scene(canvas, 800, 600); primaryStage.setTitle("Game"); primaryStage.setScene(scene); primaryStage.show(); circle = new Circle(15, Color.BLUE); circle.relocate(100, 100); canvas.getChildren().addAll(circle); final Timeline loop = new Timeline(new KeyFrame(Duration.millis(10), new EventHandler() { double deltaX = 3; double deltaY = 3; @Override public void handle(final ActionEvent t) { circle.setLayoutX(circle.getLayoutX() + deltaX); circle.setLayoutY(circle.getLayoutY() + deltaY); final Bounds bounds = canvas.getBoundsInLocal(); final boolean atRightBorder = circle.getLayoutX() >= (bounds.getMaxX() - circle.getRadius()); final boolean atLeftBorder = circle.getLayoutX() = (bounds.getMaxY() - circle.getRadius()); final boolean atTopBorder = circle.getLayoutY()

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