Alek is a lazy bastard

ColorComparator.java

class ColorComparator implements Comparator<Integer> {
  private ColorEnumType color;
  
  public ColorComparator(ColorEnumType color) {
    this.color = color;
  }
  
  @Override
  public int compare(Integer a, Integer b) {
    int mask = 0xff;
    switch (color) {
      case ColorEnumType.Red:
        mask <<= 16;
        break;
      case ColorEnumType.Blue:
        mask <<= 8;
        break;
      // do nothing for green
    }
    
    a &= mask;
    b &= mask;
    
    if (a < b) {
      return -1;
    }
    else if (a == b) {
      return 0;
    }
    else {
      return 1;
    }
  }
}