Computer scienceProgramming languagesJavaCode organizationObject-oriented programmingClass hierarchiesInterfaces and abstract classes

Abstract class vs interface

The truth about abstract classes and interfaces

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What is true about abstract classes and interfaces?

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An abstract class can have default methods while an interface cannot have them.

A class can extend only a single abstract class but it can implement any number of interfaces.

An abstract class cannot have a constructor like an interface.

An abstract class can have final, non-final, static, non-static variables (regular fields) when an interface has only non-static fields.

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