src/Eye.java

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