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Singletons may or may not have state and they refer to objects. If they are not keeping state and only used for global access, then static is better as these methods will be faster. But if you want to utilize objects and OOP concepts (Inheritance polymorphism), then singleton is better.
The advantage of using a static class is the compiler makes sure that no instance methods are accidentally added. The compiler guarantees that instances of the class cannot be created. A singleton class has a private constructor that prevents the class from being instantiated.
A singleton is nothing more than a write-once static variable on a class that always refers to the same instance of itself once it's initialized.
// Singleton Pattern vs Static Class. Singleton is a design pattern. Static classes are basically a way of grouping classes together in Java. Memory is allocated once the object is created.
Isn’t a class with only static members a kind of singleton design pattern? Is there any disadvantage of having such a class? A detailed explanation would help.
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