Java开发网 - 请问类定义中能不能 new自己

Topic: 请问类定义中能不能 new自己

1.请问类定义中能不能 new自己	Copy to clipboard
Posted by: wxjohn Posted on: 2005-08-05 16:58 public class A { public A { } public methord1(){ A a=new A(); } }

2.Re:请问类定义中能不能 new自己 [Re: wxjohn]	Copy to clipboard
Posted by: fuliang2008 Posted on: 2005-08-06 22:15 如果变量a是static就可以。在设计模式中的单件模式就是如此。程序如下 class Singleton { private static Singleton instance = null; private Singleton(){} public Singleton getInstance() { if(instance == null) instance = new Singleton(); return instance; } }

3.Re:请问类定义中能不能 new自己 [Re: fuliang2008]	Copy to clipboard
Posted by: heaven Posted on: 2005-08-07 00:02 fuliang2008 wrote: 如果变量a是static就可以。不需要这个约束。

4.Re:请问类定义中能不能 new自己 [Re: wxjohn]

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Posted by: ranchgirl
Posted on: 2005-08-08 03:22

wxjohn wrote:
请问类定义中能不能 new自己

Yes, why not???

However, I've a question for you. Why don't you just compile and run your own code by yourself? You probably would get your own answer in 3 minutes.

Another advantage of do-it-yourself is that you don't need to wait for somebody's misleading answers such as this one:

fuliang2008 wrote:
如果变量a是static就可以。

There are some more misleading stuff here:
http://www.cjsdn.net/post/view?bid=53&id=151547&sty=1&tpg=1&age=30

5.Re:请问类定义中能不能 new自己 [Re: wxjohn]	Copy to clipboard
Posted by: JavaandC Posted on: 2005-08-25 13:35 当然可以。不过你程序写的有问题应该这样写： public class A { public A (){} public void methord1() { A a=new A(); } }