package lambda.lambda3;

public class GenericMain4 {

    public static void main(String[] args) {
        GenericFunction<String, String> upperCase = s -> s.toUpperCase();

        String result1 = (String)upperCase.apply("hello");
        System.out.println("result1 = " + result1);

        GenericFunction<Integer, Integer> square = n -> n*n;
        Integer result2 = square.apply(3);
        System.out.println("result2 = " + result2);
    }

    @FunctionalInterface
    interface GenericFunction<T, R> {
        R apply(T s);

    }
}