Java内嵌类


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1.1. 内嵌类

1.1.1. 代码

/*

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  * and open the template in the editor.

  */

 

package javatutorials;

 

/**

  *

  * @author wanpor

  */

public class InnerClass {

 

    public static void main(String[] args){

        // 创建静态内嵌类

        InnerClass.A ica = new InnerClass.A();

        ica.printInfo();

       

        // 创建非静态内嵌类

        InnerClass b = new InnerClass();

        InnerClass.B icb = b.new B();

        icb.printInfo();

    }

    // 静态内嵌类

    public static class A{

        static void printInfo(){

            System.out.println("A");

        }

    }

    // 非静态内嵌类

    public class B{

        void printInfo(){

            System.out.println("B");

        }

    }

}

 

1.1.2. 说明

1.       定义静态内嵌类;

2.       定义非静态内嵌类

3.       创建静态内嵌类对象

4.       创建非静态内嵌类对象

 


静态类不能实例化,类的成员都要是静态成员和静态方法,

非静态类一般需要实例化后才可以操作,不过接口和抽像类不能直接实例化。

posted @ 2009-11-28 22:31  dzqabc  阅读(341)  评论(0编辑  收藏  举报