TAILIEUCHUNG - Lecture Java™ How to Program (8/e) - Chapter 9: Object-oriented programming: Inheritance

After completing this unit, you should be able to: 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, to access superclass members with super,. | Java™ How to Program, 8/e (C) 2010 Pearson Education, Inc. All rights reserved. (C) 2010 Pearson Education, Inc. All rights reserved. (C) 2010 Pearson Education, Inc. All rights reserved. Inheritance A form of software reuse in which a new class is created by absorbing an existing class’s members and embellishing them with new or modified capabilities. Can save time during program development by basing new classes on existing proven and debugged high-quality software. Increases the likelihood that a system will be implemented and maintained effectively. (C) 2010 Pearson Education, Inc. All rights reserved. When creating a class, rather than declaring completely new members, you can designate that the new class should inherit the members of an existing class. Existing class is the superclass New class is the subclass Each subclass can be a superclass of future subclasses. A subclass can add its own fields and methods. A subclass is more specific than its superclass and

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