@@ -28,15 +28,15 @@ public void start(Stage primaryStage) {
2828 }
2929
3030 static class BeanMachinePane extends Pane {
31- private final int triangleSize ;
31+ private final int numberOfPins ;
3232 private final int numberOfSlots ;
3333 private Circle [] pins ;
3434
3535 public BeanMachinePane (double width , double height , int numberOfSlots ) {
3636 setWidth (width );
3737 setHeight (height );
3838 this .numberOfSlots = numberOfSlots ;
39- this .triangleSize = circleCount (numberOfSlots );
39+ this .numberOfPins = getNumberOfPins (numberOfSlots );
4040 paint ();
4141 }
4242
@@ -49,7 +49,7 @@ private void paint() {
4949 paneHeight * 0.8 );
5050
5151 double distance = (lowerLine .getEndX () - lowerLine .getStartX ()) / numberOfSlots ;
52- pins = new Circle [triangleSize ];
52+ pins = new Circle [numberOfPins ];
5353 int index = 0 ;
5454 for (int i = 1 ; i < numberOfSlots ; i ++) {
5555 double x = lowerLine .getStartX () + (i * distance * 0.50 ) + distance / 2 ;
@@ -97,12 +97,18 @@ private void paint() {
9797 getChildren ().addAll (outlineShape );
9898 }
9999
100- private int circleCount (int slots ) {
101- int count = 0 ;
102- while (slots -- > 1 ) {
103- count += slots ;
104- }
105- return count ;
100+ /**
101+ * @param slots the number of slots in the bean machine
102+ * @return the number of pins in the bean machine
103+ */
104+ int getNumberOfPins (int slots ) {
105+ int numPins = 0 ;
106+ do {
107+ slots --;
108+ numPins += slots ;
109+ } while (slots > 1 );
110+ 111+ return numPins ;
106112 }
107113
108114 }
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