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Thread: J2SE Interview Question and Answer

  1. #1

    Rar 32 J2SE Interview Question and Answer

    What is abstract ?
    A Java keyword used in a class definition to specify that a class is not to be instantiated, but rather inherited by other classes. An abstract class can have abstract methods that are not implemented in the abstract class, but in subclasses.
    What is abstract class ?
    A class that contains one or more abstract methods, and therefore can never be instantiated. Abstract classes are defined so that other classes can extend them and make them concrete by implementing the abstract methods.
    What is abstract method ?
    A method that has no implementation.
    What is Abstract Window Toolkit (AWT) ?
    A collection of graphical user interface (GUI) components that were implemented using native-platform versions of the components. These components provide that subset of functionality which is common to all native platforms. Largely supplanted by the Project Swing component set. See also Swing.

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    Re: J2SE Interview Question and Answer


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