java - java中的嵌套类

Question

有人可以告诉我为什么下面的代码不起作用吗？

public class NestedClassPrac {
    public static class Nested {
        public void sayHello() { System.out.println("First nested class~");}
        public static class LittleNested {
            public void sayHello() { System.out.println("this is why we are nested class");}
        }
    }


    public static void main(String[] args) {
        Nested a = new Nested();
        a.sayHello();
        LittleNested b = new LittleNested();
        b.sayHello();
    }
}

错误消息:

NestedClassPrac.java:13: cannot find symbol
symbol  : class LittleNested

location: class NestedClassPrac
        LittleNested b = new LittleNested();
        ^

NestedClassPrac.java:13: cannot find symbol

symbol  : class LittleNested

location: class NestedClassPrac
        LittleNested b = new LittleNested();
                             ^
2 errors

Answer 1

        Nested.LittleNested b = new Nested.LittleNested();

你到底想做什么？