/**

* Created by john on 2016/1/7.

*/

public class Java8LamdaTester {

interface MathOperation{

int operation(int a,int b);

}

interface GreetingService {

void sayMessage(String message);

}

private int operate(int a,int b,MathOperation mathOperation) {

return mathOperation.operation(a,b);

}

final static String salutation = "Hello!";

public static void main(String[] args) {

Java8LamdaTester tester = new Java8LamdaTester();

//with type declaration

MathOperation addition = (int a,int b) -> a + b;

//with out type declaration

MathOperation subtraction = (a,b) -> a - b;

//with return statement along with curly braces

MathOperation multiplication = (int a,int b) -> { return a * b; };

//without return statement and curly braces

MathOperation division = (int a,int b) -> a / b;

System.out.println("10+5=" + tester.operate(10,5,addition));

System.out.println("10-5=" + tester.operate(10,5,subtraction));

System.out.println("10*5=" + tester.operate(10,5,multiplication));

System.out.println("10/5=" + tester.operate(10,5,division));

GreetingService greetService1 = message ->

System.out.println(message);

GreetingService greetService2 = (message) ->

System.out.println(message);

greetService1.sayMessage("John");

greetService2.sayMessage("Chang");

GreetingService greetService3 = message ->

System.out.println(salutation+message);

greetService3.sayMessage("John Chang");

}

}