public class StringComparator implements Comparator{
    public boolean isEqualTo(Object item1, Object item2) {
		return ((String) item1).compareTo((String) item2) == 0;

	}

	public boolean isLessThan(Object item1, Object item2) {
		return((String) item1).compareTo((String) item2) < 0;
	}

	public boolean isLessThanOrEqualTo(Object item1, Object item2) {
		return (isEqualTo(item1, item2) || isLessThan(item1, item2));
	}

	public boolean isGreaterThan(Object item1, Object item2) {
		return (((String) item1).compareTo((String) item2) > 0);
	}

	public boolean isGreaterThanOrEqualTo(Object item1, Object item2) {
		return (isEqualTo(item1, item2) || isGreaterThan(item1, item2));
	}
}