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Message:

Re: Singletons in Java

Posted by Steve Klingsporn on October 27, 2001 at 11:07 PM

You can do something like this:

public class Stack
{
private static Stack mInstance = null;

private Stack()
{
}

public static final Stack getInstance()
{
if (mInstance == null)
mInstance = new Stack();
return mInstance;
}
}

Basically, you always retrieve the singleton instance of Stack by going like this in your code:

Stack theStack = Stack.getInstance();

You use a static method, and the constructor is private so that other classes cannot instantiate it. The singleton instance is stored as a static reference.

Hope this helps. I realize it's being answered several years after the question was asked.

• Singleton lazy initialization Oleg November 29, 2001 at 9:47 PM (0)