added a new method getColorByIndex(int) and next() method to the enum 'Color'

Projekte/mdga/model/src/main/java/pp/mdga/game/Color.java

@@ -26,16 +26,33 @@ public enum Color {
      */
     NONE;
 
+    /**
+     * This method will be used to return a Color enumeration depending on the given index parameter.
+     *
+     * @param index as the index of the color inside the values as an Integer.
+     * @return a Color enumeration.
+     */
+    public static Color getColorByIndex(int index) {
+        if (index < 0 || index >= values().length) {
+            throw new IllegalArgumentException("");
+        }
+
+        return values()[index];
+    }
+
     /**
      * This method will be used to calculate the next color inside the sequence.
      *
      * @return color as a Color Enumeration.
      */
     public Color next() {
-        if (this.next() == NONE) {
+        Color[] colors = values();
-            return AIRFORCE;
+        int nextIndex = (this.ordinal() + 1) % colors.length;
+
+        if (colors[nextIndex] == NONE) {
+            nextIndex = (nextIndex + 1) % colors.length;
         }
 
-        return values()[(ordinal() + 1) % values().length];
+        return colors[nextIndex];
     }
 }