import java.awt.Color;
+import java.util.List;
+import java.util.Arrays;
-public class Eye {
+public class Eye implements Comparable<Eye> {
private Color color;
+ private List<String> colorList = Arrays.asList("black", "green", "blue", "brown");
- Eye(Color color) {
+ Eye(String color) {
setColor(color);
}
return color;
}
- public void setColor(Color color) {
- this.color = color;
+ public void setColor(String color) {
+ if (validateColor(color)) {
+ if (color.equals("brown"))
+ this.color = new Color(88, 41, 0);
+ else
+ this.color = Color.getColor(color);
+
+ } else {
+ throw new IllegalArgumentException("Color must be " + colorList.toString());
+ }
+ }
+
+ private boolean validateColor(String color) {
+ return colorList.contains(color);
+ }
+
+ @Override
+ public int compareTo(Eye eye) {
+ double r_diff = this.getColor().getRed() - eye.getColor().getRed();
+ double g_diff = this.getColor().getGreen() - eye.getColor().getGreen();
+ double b_diff = this.getColor().getBlue() - eye.getColor().getBlue();
+ // See https://en.wikipedia.org/wiki/Color_difference
+ Double distance = Math.sqrt(2 * Math.pow(r_diff, 2) + 4 * Math.pow(g_diff, 2) + 3 * Math.pow(b_diff, 2));
+ return distance.intValue();
}
}