Functional Interface Examples

gistfile1.txt

import java.util.function.*;

public class FunctionalInterfaces {

    public static void main(String args[]) {

        Predicate<String> lengGtTen = (s) -> s.length() > 0;
        System.out.println(lengGtTen.test("20"));

        Consumer<String> lowerCaseConsumer = (str) -> System.out.println(str.toLowerCase());
        lowerCaseConsumer.accept("ABCD");

        Function<Integer,String> intToStr = (num) -> Integer.toString(num);
        System.out.println(intToStr.apply(10).length());

        Supplier<String> s = () -> "Back to learning Java";
        System.out.println(s.get());

        BinaryOperator<Integer> addTwo = (a,b) -> a + b +10;
        System.out.println(addTwo.apply(10,20));

        UnaryOperator<Integer> addTen = (num) -> num + 10;
        System.out.println(addTen.apply(10));
    }


}