Question

This is the example:

http://www.tutorialspoint.com/java/java_using_singleton.htm

When looking at the 1st example, when user writes : Singleton.getInstance() , then it calls out :

new Singleton()

I don’t get it, how it is singleton, when everytime it creates a new singleton object?

I understand the 2nd example. If singleton is null, then create new object, but in first example, it always creates new object??

Whats up with that?

Answer 1

No, in the first example the only call to new Singleton() is here (within Singleton):

private static Singleton singleton = new Singleton( );

That’s a static variable initializer. It gets executed once, and only when needed. (If you never touch the Singleton class, the initializer won’t get executed.)