what is interface in java | java interview questions and answers | wikitechy.com

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Interface is a bluprint of a class that have static constant and abstract methods.It can be used to achieve fully abstraction and multiple inheritance.

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34 thoughts on “what is interface in java | java interview questions and answers | wikitechy.com

  1. Before Java 8 interfaces are pure abstract classes which allow us to define public static final variables and public abstract methods(by default). … A class will implements all the methods in an interface. … 2.What will happen if we define a concrete method in an interface?

  2. An interface is a reference type in Java. It is similar to class. It is a collection of abstract methods. A class implements an interface, thereby inheriting the abstract methods of the interface. Along with abstract methods, an interface may also contain constants, default methods, static methods, and nested types.

  3. Why multiple inheritance is supported in Interface while it is not supported in case of class. … It is used to achieve fully abstraction and multiple inheritance in Java. … If a class implements multiple interfaces, or an interface extends multiple interfaces

  4. Interface is designed for the purpose to provide guidelines to a programmer that the programmer is going to develop. If we define the interface as final then we cannot implement the interface in …

  5. A class which implements an interface should implement all the methods (abstract) otherwise compiler will throw an error. If we declare class as abstract no need to implement methods. No need of overriding default and static methods.

  6. An interface is a reference type inJava. It is similar to class. It is a collection of abstract methods. A class implements an interface, thereby inheriting the abstract methods of theinterface.

  7. Before Java 8 interfaces are pure abstract classes which allow us to define public static final variables and public abstract methods(by default). … A class will implements all the methods in an interface. … 2.What will happen if we define a concrete method in an interface?

  8. An interface is a reference type in Java. It is similar to class. It is a collection of abstract methods. A class implements an interface, thereby inheriting the abstract methods of the interface. Along with abstract methods, an interface may also contain constants, default methods, static methods, and nested types.

  9. a point where two systems, subjects, organizations, etc. meet and interact.

    "the interface between accountancy and the law"

    2.

    COMPUTING

    a device or program enabling a user to communicate with a computer.

    "a graphical user interface"

    verb

    1.

    interact with (another system, person, etc.).

    "you will interface with counterparts from sister companies"

    2.

    COMPUTING

    connect with (another computer or piece of equipment) by an interface.

    "the hotel's computer system can interface automatically with the booking system"

  10. A class implements an interface, thereby inheriting the abstract methods of the interface. Along with abstract methods, an interface may also contain constants, default methods, static methods, and nested types.

  11. Morning Star Online – 2 days ago
    Arrests were made in cities in Sulawesi, Java and Papua, but demonstrations went ahead in at least 15 places, said Veronica … are demanding a second referendum, this time without state interference.

  12. An interface is a reference type in Java. It is similar to class. It is a collection of abstract methods. A class implements an interface, thereby inheriting the abstract methods of the interface. Along with abstract methods, an interface may also contain constants, default methods, static methods, and nested types.

  13. A class Along with abstract methods, an interface may also contain constants, default methods, static methods, and nested types.implements an interface, thereby inheriting the abstract methods of the interface.

  14. The interface in java is a mechanism to achieve fully abstraction. There can be only abstract methods in the java interface not method body. It is used to achieve fully abstraction and multiple inheritance in Java.

  15. An interface is a reference type in Java. It is similar to class. It is a collection of abstract methods. A class implements an interface, thereby inheriting the abstract methods of the interface. Along with abstract methods, an interface may also contain constants, default methods, static methods, and nested types.

  16. An interface is a reference type in Java. It is similar to class. It is a collection of abstract methods. A class implements an interface, thereby inheriting the abstract methods of the interface. Along with abstract methods, an interface may also contain constants, default methods, static methods, and nested types.

  17. An interface is a reference type in Java. It is similar to class. It is a collection of abstract methods. A class implements an interface, thereby inheriting the abstract methods of the interface. Along with abstract methods, an interface may also contain constants, default methods, static methods, and nested types

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