Java开发网 - 怎样引用public的非静态变量？

Topic: 怎样引用public的非静态变量？

1.怎样引用public的非静态变量？	Copy to clipboard
Posted by: ggloverv Posted on: 2008-10-26 21:03 public class Shit { public int i=2; public static int j=3; public static void main(String[] args) { System.out.println(i);//有错 System.out.println(j); } } 怎样才能输出那个i呢？

2.Re:怎样引用public的非静态变量？ [Re: ggloverv]	Copy to clipboard
Posted by: ice0819 Posted on: 2008-10-27 17:23 Shit shit=new Shit（）； System.out.println(shit.i);

3.Re:怎样引用public的非静态变量？ [Re: ggloverv]	Copy to clipboard
Posted by: winoo7 Posted on: 2008-10-28 08:43 Shit s = new Shit(); System.out.println(s.i);

4.Re:怎样引用public的非静态变量？ [Re: ggloverv]	Copy to clipboard
Posted by: gbluo Posted on: 2008-10-28 09:23 还有别的方法吗?

5.Re:怎样引用public的非静态变量？ [Re: gbluo]

Copy to clipboard

Posted by: JiafanZhou
Posted on: 2008-11-11 22:17

gbluo wrote:
还有别的方法吗?

No! It is the only mean to get access to the non-static member field. The reason for this is that non static member fields or methods are bounded to a specific instance of the object. Thus it will be forced to be manipulated by the instance reference.

Another thing worth to be mentioned is that it is *not* recommended to declare public to member fields. It would be preferred to declare public get/set methods, in conformance with the JavaBean standard. And it is subject to one of the most important OO rule: Encapsulation.

By the way, why do you declare your class name as "SHXT"? It is a forbidden keyword in the Java World.... Smile

Regards,
Jiafan