lamda表达式的推导

lamda表达式的推到过程

package TestLamda;
//推导λ表达式
public class TestLamda1 {
    
    

    //3.静态内部类
    static class Like2 implements  ILike{
    
    
        @Override
        public void lamda() {
    
    
            System.out.println("I like lamda2");
        }
    }
    public static void main(String[] args) {
    
    
        ILike like = new Like();
        like.lamda();

        like = new Like2();


        like.lamda();

        //4.局部内部类
        class Like3 implements  ILike{
    
    
            @Override
            public void lamda() {
    
    
                System.out.println("I like lamda3");
            }
        }
        like =new Like3();
        like.lamda();

        //5.匿名内部类，没有类的名称，必须借助接口或父类
         like = new ILike() {
    
    
            @Override
            public void lamda() {
    
    
                System.out.println("I like lamda4");
            }
        };
        like.lamda();

        //6.lamda简化
        like = ()-> {
    
    System.out.println("I like lamda5");
    };
        like.lamda();
    }
}
//1.定义一个函数式接口
interface ILike{
    
    
    void lamda();
}
//2.实现类
class Like implements  ILike{
    
    
    @Override
    public void lamda() {
    
    
        System.out.println("I like lamda1");
    }
}