Question

PP 3.13 Write a JavaFX application that draws a circle centered at poinit (200, 200) with a random radius in the range 50 to 150. Each time the program is run it will draw a different circle. PP 3.14 Write a JavaFX application that displays your name rotated at a random angle (0 to 360). Each time the program is run it will draw your name at a different angle. a random color created using the rgb method of the Color class. Each time the program is run it will display a rectangle with a different color. PP 3.16 Write a JavaFX application that displays a depiction of a solar system with a sun and three planets. Use ellipses to show the orbits of the planets around the sun.

PP.15

Answer 1

1. package lab.random;
2. import javafx.application.Application;
3. import javafx.scene.Scene;
4. import javafx.scene.layout.BorderPane;
5. import javafx.scene.paint.Color;
6. import javafx.scene.paint.Paint;
7. import javafx.scene.shape.Reactangle;
8. import javafx.scene.shape.Shape;
9. import javafx.stage.Stage;
10. import java.util.Random;
11. /**
12. *It is a javafx application to draw a rectangle.
13. *The rectangle will be filled with a different color at every launch.
14. */
15. public class RandomColor extends Application {
16. public static void main(String[] args) {
17. launch(args);
18. }
19. @Override
20. public void start(Stage stage) throws Exception {
21. BorderPane root = new BorderPane();
22. stage.setMaxHeight(350);
23. stage.setMaxWidth(350);
24. stage.setResizable(false);
25. Scene scene = new Scene(root, stage.getMaxWidth(), stage.getMaxHeight());
26. stage.setScene(scene);
27. Rectangle rectangle = createRectangle();
28. rectangle.setFill(randomColour());
29. root.setCenter(rectangle);
30. stage.show();
31. }
32. /**
33. Creates a rectangle
34. */
35. private Rectangle createRectangle() {
36. Rectangle rectangle = new Rectangle(150);
37. return rectangle;
38. }
39. /**
40. Create random color every time the method is called.
41. */
42. public Paint randomColor() {
43. Random random = new Random();
44. int r = random.nextInt(255);
45. int g = random.nextInt(255);
46. int b = random.nextInt(255);
47. return Color.rgb(r, g, b);
48. }
49. }