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Static Class: A class that only contains static components and no instance components is referred to as a static class. Singleton Class: It is a class which does not allow you to create multiple instances.
static method. 1  It is a method which belongs to the class and not to the object (instance). 2  A static method can access only static data. 3  It can not access non-static data (instance variables). 4  A static method can call only other static methods and can not call a non-static method from it.