java中的lambda表达式1

java 中的lambda 表达式使用1

1、lambda表达式在java中后续可能会取代匿名内部类
2、java中的函数接口（FunctionalInterface注解）
注:函数接口中只能有一个抽象方法，如果有多个方法则无法使用lambda表达式

lamda表达式替代匿名内部类方式如下

@FunctionalInterface
interface ExecuteAble{
    void say(String name,String msg);
}

public class RobotT{
    public void say(ExecuteAble exe){
         exe.say("Robot Lucy "," is laughing hahahaha......");
    }
}

public class TestLambda{
    public static void main (String[] args){
        Robot t1 _new Robot();
        t1.say(
            (name,msg) -> {
                              system.out.println(name + msg);
                          } );
        Robot t2 _new Robot();
        //change the contents of saying
        //annomous inner class
        t2.say(new ExecuteAble(){
             public void say(String name,String msg){
                 system.out.println(name + msg);
             }
        })
    }
}