分析Java中Lambda表达式的简化过程

代码详解：

public class LambdaDemo {
          
   

    //3.定义一个静态内部类
    static class Like2 implements ILike{
          
   
        @Override
        public void lambda() {
          
   
            System.out.println("i like lambda2");
        }
    }
    public static void main(String[] args) {
          
   
        ILike like = new Like();
        like.lambda();

        //创建静态内部类对象
        like = new Like2();
        like.lambda();

        //4.定义一个局部内部类
        class Like3 implements ILike{
          
   
            @Override
            public void lambda() {
          
   
                System.out.println("i like lambda3");
            }
        }
        //创建局部内部类对象
        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
        like = new ILike() {
          
   
            @Override
            public void lambda() {
          
   
                System.out.println("i like lambda4");
            }
        };
        like.lambda();

        //使用lambda来简化
        like = ()-> {
          
   
            System.out.println("i like lambda5");
        };
        like.lambda();
    }

}

//1.定义一个函数式接口（函数式接口：只包含唯一一个抽象方法的接口）
interface ILike{
          
   
    void lambda();
}

//2.实现类
class Like implements ILike{
          
   
    @Override
    public void lambda() {
          
   
        System.out.println("i like lambda");
    }
}