interface TwoElementsPredicate <O extends Object> { boolean pred(O o1, O o2); }


class ElementUtils {
    public static <O extends Object> Object betterEntry (O o1, O o2, TwoElementsPredicate <O>twoElementsPredicate){
        return twoElementsPredicate.pred(o1, o2) ? o1 : o2;
    }
}


public class Main {
    public static void main(String [] args) {
        String string1 = "bardzobardzodlugistring";
        String string2 = "krotkistring";
        System.out.println(ElementUtils.betterEntry(string1, string2, (s1,s2) -> s1.length() > s2.length() ));
    }
}