Java How to Program, Early Objects, 11th Edition

... strokeRectanglesButtonPressed(ActionEvent event) { 14         draw("rectangles");
15      }
16
17      // when user presses Draw Ovals button, call draw for ovals
18      @FXML
19      void strokeOvalsButtonPressed(ActionEvent event) {
20         draw("ovals");
21      }
22
23      // draws rectangles or ovals based on which Button the user pressed
24      public void draw(String choice) {
25         // get the GraphicsContext, which is used to draw on the Canvas
26         GraphicsContext gc = canvas.getGraphicsContext2D();
27
28         // clear the canvas for next set of shapes
29         gc.clearRect(0, 0, canvas.getWidth(), canvas.getHeight());
30
31         int step = 10;
32
33         // draw 10 overlapping shapes
34         for (int i = 0; i < 10; i++) {
35            // pick the shape based on the user's choice
36            switch (choice) {
37               case "rectangles": // draw rectangles ...