Web Reference: Abstract classes are similar to interfaces. You cannot instantiate them, and they may contain a mix of methods declared with or without an implementation. However, with abstract classes, you can declare fields that are not static and final, and define public, protected, and private concrete methods. Jul 12, 2025 · Now let us finally conclude out the differences between them after having an adequate understanding of both of them. Abstract classes can’t be instantiated. Abstract method bodies must be empty. Other classes extend abstract classes. Sub-classes must implement the abstract class’s abstract methods. Can have both abstract and concrete methods. The abstract keyword is a non-access modifier, used for classes and methods: Abstract class: is a restricted class that cannot be used to create objects (to access it, it must be inherited from another class).
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