src/Eye.java

   1 import java.awt.Color;
   2 import java.util.Arrays;
   3
   4 public class Eye {
   5     private String strColor;
   6     private Color color;
   7     private String[] colorsList = {"black", "blue", "brown", "green"};
   8
   9     Eye() {
  10         sortColorList();
  11     }
  12
  13     /**
  14      * @param color
  15      */
  16     Eye(String color) {
  17         setStrColor(color);
  18         setColor(color);
  19         sortColorList();
  20     }
  21
  22     public String getStrColor() {
  23         return strColor;
  24     }
  25
  26     public void setStrColor(String strColor) {
  27         if (validateColor(strColor)) {
  28             this.strColor = strColor;
  29         } else {
  30             throw new IllegalArgumentException("Color must be" + this.colorListToString());
  31         }
  32     }
  33
  34     public String[] getColorsList() {
  35         return colorsList;
  36     }
  37
  38     /**
  39      * @return
  40      */
  41     public Color getColor() {
  42         return color;
  43     }
  44
  45     /**
  46      * @param color
  47      */
  48     public void setColor(String color) {
  49         if (validateColor(color)) {
  50             if (color.equals("black"))
  51                 this.color = Color.black;
  52             else if (color.equals("blue"))
  53                 this.color = Color.blue;
  54             else if (color.equals("brown"))
  55                 this.color = new Color(88, 41, 0);
  56             else if (color.equals("green"))
  57                 this.color = Color.green;
  58         } else {
  59             throw new IllegalArgumentException("Color must be" + this.colorListToString());
  60         }
  61     }
  62
  63     /**
  64      * @param color
  65      * @return
  66      */
  67     private boolean validateColor(String color) {
  68         for (String c : colorsList) {
  69             if (color.equals(c)) {
  70                 return true;
  71             }
  72         }
  73         return false;
  74     }
  75
  76     private void sortColorList() {
  77         Arrays.sort(this.colorsList);
  78     }
  79
  80     /**
  81      * @param eye
  82      * @return
  83      */
  84     public int distanceTo(Eye eye) {
  85         double r_diff = this.getColor().getRed() - eye.getColor().getRed();
  86         double g_diff = this.getColor().getGreen() - eye.getColor().getGreen();
  87         double b_diff = this.getColor().getBlue() - eye.getColor().getBlue();
  88         //See https://en.wikipedia.org/wiki/Color_difference
  89         Double distance = Math.sqrt(2 * Math.pow(r_diff, 2) + 4 * Math.pow(g_diff, 2) + 3 * Math.pow(b_diff, 2));
  90         return distance.intValue();
  91     }
  92
  93     private String colorListToString() {
  94         StringBuilder stringBuilder = new StringBuilder();
  95         for (String c : colorsList) {
  96             stringBuilder.append(" ");
  97             stringBuilder.append(c);
  98         }
  99         return stringBuilder.toString();
 100     }
 101 }