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Inheritance is frequently used to integrate your code with library code -- subclass off a library class, 90% inherit the standard behavior, and 10% override a few key methods. This is the most common use of inheritance. This works best if the superclass code is deliberately factored into methods to support overriding.
We then review the concept of inheritance and demonstrate how the inheritance models of popular object-oriented languages like Smalltalk [Goldberg83], Flavors [Moon86], and ObjectiveC [Cox84] fall short in their support of encapsulation. We examine the requirements for full support of encapsulation with inheritance.
Inheritance is a binary relation between classes (say P and Q) that enables one to define a class (Q) in terms of another class (P) incrementally, by adding new fields, adding new methods, or modifying existing methods through overriding. A class Q is a subclass of class P if class Q inherits from class P. class P { . }
In this chapter you will learn: How inheritance promotes software reusability. The notions of superclasses and subclasses. To use keyword extends to create a class that inherits attributes and behaviors from another class. To use access modifier protected to give subclass methods access to superclass members.
Understand inheritance and how to use it to develop new classes based on existing classes. Learn the notions of superclasses and subclasses and the relationship between them. Use keyword extends to create a class that inherits attributes and behaviors from another class. Use access modifier.
Inheritance in Java With inheritance, we can define a superclass namedCreature that abstracts the shared attributes and methods. We can then definePlayer and Monster as subclasses of Creature.
OOP lets you: Build some extensible software concisely. Exploit an intuitive analogy between interaction of physical entities and interaction of software pieces. It also: Raises tricky semantic and style issues that deserve careful PL study. Is more complicated than functions.
