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wat is singletone

anilellendula kumar
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Joined: Jul 12, 2005
Posts: 43

Wat is singletone pattern, can anybody help me with an one example,how to make class as a singletone
Niyas Ahmed Sheikh
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Joined: Jun 15, 2005
Posts: 129
In Singleton Pattern, You can't create a object for others class. They are restricted by making the constructor of their as private.

For the Singleton class the following is Mandatory:
1. Constructor should be private.
2. The object should be static.
(i.e., static classname ref = new classname(); )
3. Use static method to get the instance.

May be this link will be useful
Stan James
(instanceof Sidekick)
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Joined: Jan 29, 2003
Posts: 8791
"Mandatory" is a bit strong there. Singleton has a mechanism to control the number of instances of a class. The number is usually "one" but there could be cases where some other small, controlled number is appropriate. And there are other mechanisms to control creation besides a private constructor.

The simplest mechanism is as described above:

Do look up the other threads on this topic. We've discussed WHY you'd want a singleton and some of the dangers many times before.

A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi
Layne Lund
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Joined: Dec 06, 2001
Posts: 3061
Have you ever heard of Google? If not, check out all the links it gives that describe the Singleton pattern.


Java API Documentation
The Java Tutorial
I agree. Here's the link:
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