java 8 lambda example

java8-lambda-example.java

@java.lang.FunctionalInterface
interface Math
{
  public int calc(int a, int b);
}

public class LambdaExample
{
  public static void main(String[] args) {
    // define your function
    Math add = (a, b) -> a+b;

    // execute it later (by event)
    int res = add.calc(7, 5);
    System.out.println(res); //12
  }
}