Lembda

package com.zishi.lesson3;/*
推导Lambdal表达式*/
public class TestLembdal {//3.内部静态类static class Like2 implements ILike{@Overridepublic void lambda() {System.out.println("i like lambda2");}}public static void main(String[] args) {ILike like = new Like();like.lambda();like = new Like2();like.lambda();//4.局部内部类class Like3 implements ILike{@Overridepublic void lambda() {System.out.println("i like lambda3");}}like = new Like3();like.lambda();//5.匿名内部类:没有类的名称，必须借助接口或者父类实现like = new ILike() {@Overridepublic void lambda() {System.out.println("i like lambda4");}};like.lambda();//6.用lambda()简化like = ()->{System.out.println("i like lambda5");};like.lambda();}
}//1.定义一个函数式接口：只有一个抽象类方法
interface ILike{void lambda();}//2.实现类
class Like implements ILike{@Overridepublic void lambda() {System.out.println("i like lambda");}
}

package com.zishi.lesson3;public class TestLembdal2 {public static void main(String[] args) {ILove love = null;//1.lambda表示简化
//        ILove love = (int a)->{
//            System.out.println("i love -->"+a);
//        };//        //2.简化括号
//        love = a -> {
//            System.out.println("i love -->"+a);
//        };//3.简化：去掉花括号love = (a,b,c) -> System.out.println("i love -->"+a+b+c);love.love(520,520,520);//总结：/*lambda表达式只能有一行代码的情况下，才能简化成一行，如果有一行，那么就用代码快包裹前提是接口为函数式接口多个参数也可以去掉参数类型，要去掉就都去掉，必须加上括号*/}
}interface ILove{void love(int a,int b,int c);
}