函数式接口和lambda表达式

Lambda表达式的推导过程

package com.sympa.lesson01;

public class lambda01 {

    //3.静态内部类
    static class Lambda2 implements Love{
        @Override
        public void lambda() {
            System.out.println("lambda2");

        }
    }

    public static void main(String[] args){

        Love lam = new Lambda1();

        //4.局部内部类
        class Lambda3 implements Love{
            @Override
            public void lambda() {
                System.out.println("lambda3");
            }
        }

        //5.匿名内部类，没有类的名称，只能借助接口和父类
        lam = new Love(){
            @Override
            public void lambda() {
                System.out.println("lambda4");
            }
        };

        //lambda表达式
        lam = () -> {
            System.out.println("lambda5");
        };
    }
}

//1.定义一个函数式接口
interface Love{
    void lambda();
}
//2.实现类
class Lambda1 implements Love{
    @Override
    public void lambda() {
        System.out.println("lambda1");
    }
}