What is an abstract function in Java?

ABSTRACT METHOD in Java, is a method that has just the method definition but does not contain implementation . A method without a body is known as an Abstract Method. It must be declared in an abstract class. The abstract method will never be final because the abstract class must implement all the abstract methods.

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Why do we use abstract class?

An abstract class is used if you want to provide a common, implemented functionality among all the implementations of the component . Abstract classes will allow you to partially implement your class, whereas interfaces would have no implementation for any members whatsoever.

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