Abstract Classes – some quick facts

  • An abstract class is a class that contains one or more abstract methods
  • Obviously, you cannot instantiate an abstract class
  • You can create a subclass, implement the abstract methods. The subclass can be instantiated
  • Not all methods in the abstract class need to be abstract.
  • Though a class doesn’t have any abstract methods, you can still define the class as abstract
  • A private method can’t be abstract. All abstracts must me public
  • An abstract class can’t be final



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