class CollectionUtils {

    public static boolean isSizeEquals(Collection<?> col0, Collection<?> col1) {
        if (col0 == null) {
            return col1 == null;
        } else {
            if (col1 == null) {
                return false;
            } else {
                return col0.size() == col1.size();
            }
        }
    }

    private  CollectionUtils();

}