What is the difference between abstract and concrete classes in Java?
An example of an AI chatbot conversation about Java OOP concepts: abstract vs concrete classes.
What is the difference between abstract and concrete classes in Java?
In Java, an abstract class cannot be instantiated and may contain abstract methods, while a concrete class can be instantiated and must implement all abstract methods from its abstract superclass.
Can you give me an example of each?
Sure! An abstract class could be Animal with an abstract method makeSound(). A concrete class could be Dog that extends Animal and implements makeSound() to return "Bark".
Why would I use an abstract class instead of a concrete class?
Abstract classes are useful for defining a common interface and shared behavior for subclasses, promoting code reusability and a clear hierarchy.
Are there any limitations to using abstract classes?
Yes, a class can only extend one abstract class, which can limit flexibility. Also, abstract classes cannot be instantiated directly.
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