Anytime one of these phones rings, the same owner picks it up. A phone is typically owned by a single person, while a person can own many phones. Let's use the example of a cellphone and its owner. This Singleton class may be responsible for instantiating itself, or you can delegate the object creation to a factory class. Anytime multiple classes or clients request for that class, they get the same instance of the class. The Singleton Pattern is a software design pattern that guarantees a class has one instance only and a global point of access to it is provided by that class.
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