Java 内部类种类及使用解析

package com.learnjava.innerclass;

class MemberInner
{
    private int d = 1;
    private int a = 2;

    // 定义一个成员内部类
    public class Inner2
    {
        private int a = 8;

        public void doSomething()
        {
            // 直接访问外部类对象
            System.out.println(d);
            System.out.println(a);// 直接访问a，则访问的是内部类里的a

            // 如何访问到外部类里的a呢？  //InnerClass.this.*也是可以访问方法
            System.out.println(MemberInner.this.a);
        }

    }

}
//

public class InnerClass {
public String a;
public void test(){
Student student = new Student();
student.goToSchool();
}
public void test1(){
//方法内部类
class ClassRoom{
public void sendMail(){
System.out.println(a);
}
}
}
public class Student{
public void goToSchool(){
System.out.println("111");
}
}
public static void main(String[] args) {
InnerClass clazz = new InnerClass();
clazz.test();
//成员内部类
Student student = clazz.new Student();
student.goToSchool();
//方法内部类

}

}