| 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 | } |