lambda表達式的使用

public class Test {

interface GreetingService {

    void sayMassage(String a, String b);

}




public static void main(String args[]) {

    GreetingService greetingService1 = (a, b) -> 
    System.out.println(a + b);

    greetingService1.sayMassage("abc", "sdd");

}

}