Class AbstractAnimal

java.lang.Object
AbstractAnimal
Direct Known Subclasses:
DogWithDefault
abstract class AbstractAnimal extends Object
Abstract base class combining shared state, a concrete default method, and an abstract method subclasses must implement.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected int
    age
    Structural state isolated inside a class footprint (interfaces cannot hold this).

  • Constructor Summary

    Constructors
    Constructor
    Description
    AbstractAnimal()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    (package private) void
    sleep()
    A concrete default method, inherited as-is by all subclasses.
    (package private) abstract void
    speak()
    Abstract method that subclasses must override.

    Methods inherited from class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • age

      protected int age
      Structural state isolated inside a class footprint (interfaces cannot hold this).

  • Constructor Details

    • AbstractAnimal

      AbstractAnimal()

  • Method Details

    • sleep

      void sleep()
      A concrete default method, inherited as-is by all subclasses.

    • speak

      abstract void speak()
      Abstract method that subclasses must override.