[java]内部类

package com.ma.demo12;public class Outer {    int num = 10;    public class Inner {        int num = 20;        public void show() {            int num = 30;            System.out.println(num);            System.out.println(this.num);            System.out.println(new Outer().num);            System.out.println("-----------------");            System.out.println(Outer.this.num);        }    }}