package java8; import java.util.function.Function; public class FunctionDemo { public static void main(String[] args) { Integer n = 3; // CalculateSquare c = (no) -> no * no; // System.out.println(c.getSquare(n)); Function value = (no) -> no * no; System.out.println(value.apply(5)); } } //interface CalculateSquare{ // int getSquare(int n); //}