[PDF] abstract class and interface in javascript

An interface can have only abstract methods, an abstract class can have both abstract and non-abstract methods. An interface can only have public members, while an abstract class can have protected and public members. Abstract class can provide the implementation of the interface.
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  • What is difference between interface and abstract class?

    The Abstract class and Interface both are used to have abstraction. An abstract class contains an abstract keyword on the declaration whereas an Interface is a sketch that is used to implement a class. Explore more differences between abstract class and interface in java.

  • Is there abstract classes in JavaScript?

    Abstract classes need to be inherited and require subclasses to provide implementations for the method declared in the abstract class. As in Java, we have the abstract keyword to make a class an abstract class; there are no such reserve keywords in JavaScript to declare a class an abstract class.

  • Can we use abstract class and interface together?

    3 Answers. It's perfectly normal to use these two together. Consider for instance AbstractList (implementing List ) and AbstractMap (implementing Map ) in the JDK. Further, I can see an argument for doing it that way, specifically that it removes the coupling between the abstract class and the interface.
  • Interfaces and abstract classes are both examples of abstractions in object-oriented programming. Where an interface can only define the properties and methods of an abstraction, an abstract class can define the properties and methods in addition some common behavior.
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