Java – Abstract classes & methods

Java – Abstract classes & methods

Abstract class is a class where its implementation is incomplete or non-existent. Abstract class cannot be instantiated but can be extended. A subclass that implements an abstract class can be instantiated. Abstract class is similar to interface but also have some differences. Both cannot be instantiated and both can contain methods without implementation. The differences are: a class can extend only one class but can implement many interfaces separating them with “,” An abstract class can define fields that are not static nor final. An interface all fields must be…

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