import java.util.Comparator; public class Main { public static void main(String[] args) { Comparator<String> byLength = (a, b) -> a.length() - b.length(); System.out.println(byLength.compare("BMW", "Volvo")); System.out.println(byLength.compare("Mazda", "Ford")); System.out.println(byLength.compare("Volvo", "Mazda")); } }