src/Eye.java

   1 import java.awt.Color;
   2
   3 public class Eye implements Comparable<Eye> {
   4     private Color color;
   5     private String[] colorsList = {"black", "green", "blue", "brown"};
   6
   7     Eye() {
   8     }
   9
  10     /**
  11      * @param color
  12      */
  13     Eye(String color) {
  14         setColor(color);
  15     }
  16
  17     public String[] getColorsList() {
  18         return colorsList;
  19     }
  20
  21     /**
  22      * @return
  23      */
  24     public Color getColor() {
  25         return color;
  26     }
  27
  28     /**
  29      * @param color
  30      */
  31     public void setColor(String color) {
  32         if (validateColor(color)) {
  33             if (color.equals("brown"))
  34                 this.color = new Color(88, 41, 0);
  35             else
  36                 this.color = Color.getColor(color);
  37
  38         } else {
  39             throw new IllegalArgumentException("Color must be " + colorsList);
  40         }
  41     }
  42
  43     /**
  44      * @param color
  45      * @return
  46      */
  47     private boolean validateColor(String color) {
  48         for (String c : colorsList) {
  49             if (color.equals(c)) {
  50                 return true;
  51             }
  52         }
  53         return false;
  54     }
  55
  56     /**
  57      * @param eye
  58      * @return
  59      */
  60     @Override
  61     public int compareTo(Eye eye) {
  62         double r_diff = this.getColor().getRed() - eye.getColor().getRed();
  63         double g_diff = this.getColor().getGreen() - eye.getColor().getGreen();
  64         double b_diff = this.getColor().getBlue() - eye.getColor().getBlue();
  65         // See https://en.wikipedia.org/wiki/Color_difference
  66         Double distance = Math.sqrt(2 * Math.pow(r_diff, 2) + 4 * Math.pow(g_diff, 2) + 3 * Math.pow(b_diff, 2));
  67         return distance.intValue();
  68     }
  69 }