Write a JavaFX ONLY program named CircleZapper that displays a circle with a rad

Question

Write a JavaFX ONLY program named CircleZapper that displays a circle with a radius of 10 pixels, filled with a random color at a random location on the screen. When you click the circle, it disappears and a new random color circle is displayed at another random location (see display below). After twenty circles are clicked, display the time spent in the pane. To detect whether a point is inside the circle, use the contains method defined in the Node class. You can capture the initial starting time with a statement like:

startTime = System.currentTimeMillis()

Explanation / Answer

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.text.Text;
import javafx.stage.Stage;

/**

* 2.   Write a Java program named CircleZapper that displays a circle with a radius of 10 pixels,
* filled with a random color at a random location on the screen. When you click the circle,
* it disappears and a new random color circle is displayed at another random location (see display below).
* After twenty circles are clicked, display the time spent in the pane. To detect whether a point is
* inside the circle, use the contains method defined in the Node class. You can capture the initial
* starting time with a statement like:
* todo finish the timer implementation
*/

public class CircleZapper extends Application {

        static int circleCount = 0;

        @Override
        public void start(Stage primaryStage) {

            double width = 500;
            double height = 500;

            Circle c = new Circle(0, 0, 10);
            updateCircle(c);
            Pane pane = new Pane(c);
            Text count = new Text(50,50,circleCount + "");
            pane.getChildren().add(count);
            Long startTime = System.currentTimeMillis();

            c.setOnMouseClicked(e-> {
                //method to determine what was clicked and update
                circleDataFilter(width, height, c, pane, count, startTime);
            });
            primaryStage.setScene(new Scene(pane, width, height));
            primaryStage.setTitle("Circle Zapper");
            primaryStage.show();
        }

    /**
     * This method determines if the game is over by monitoring the count
     * @param width scene width
     * @param height scene height
     * @param c the targeted circle
     * @param pane the pane for adding and removing circles
     * @param count the count of circles
     */
    private void circleDataFilter(double width, double height, Circle c, Pane pane, Text count, Long startTime) {
        if (circleCount < 19) {
            circleCount++;
            count.setText(circleCount + "");

            updateCircle(c);
        } else {
//            when we ar done
            circleCount++;
            count.setText(circleCount + "");
            pane.getChildren().remove(c);
            Long timeSpent =System.currentTimeMillis() - startTime;
            pane.getChildren().add(new Text(width / 2, height / 2, "Time spent is milliseconds " + timeSpent));
        }
    }

    /**
     * This method is used to create circles of random color when the pane is clicked
     * @param c tje cicle obj
     */
    private void updateCircle(Circle c) {

        double min = c.getRadius() + 5;
        double max = 500 - c.getRadius() - 5;

        c.setCenterX((Math.random() * (max - min) + min));
        max = 500
                - c.getRadius() - 5;
        c.setCenterY((Math.random() * (max - min) + min));

        c.setFill(new Color(Math.random(), Math.random(), Math.random(), 1));
    }

    public static void main(String[] args) {
            Application.launch(args);
        }

    }

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