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Answer Posted / supraja
The Singleton pattern
In Design Patterns, the authors describe the Singleton
pattern like this:
Ensure a class has only one instance, and provide a global
point of access to it.
The figure below illustrates the Singleton design pattern
class diagram.
Singleton class diagram
As you can see from the figure above, there's not a whole
lot to the Singleton design pattern. Singletons maintain a
static reference to the sole singleton instance and return
a reference to that instance from a static instance()
method.
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