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    Copyright
    Dedication
    About the Authors
    Preface
    How to Use This Book and Web Resources
    Ch. 1. OBJECT-ORIENTED PROGRAMMING BASICS
    Ch. 2. OBJECT MODELLING
    Ch. 3. EXTENSIBILITY AND REUSABILITY – INHERITANCE AT WORK
    Ch. 4. DYNAMIC MODELLING
    Ch. 5. ANALYSIS AND DESIGN METHODOLOGIES
    Ch. 6. C++ FUNDAMENTALS AND BASIC PROGRAMMING
    Ch. 7. C++ PROGRAMMING BASICS AND CONTROL LOOPS
    Ch. 8. FUNCTIONS, STORAGE CLASS PREPROCESSOR DIRECTIVES, AND ARRAYS AND STRINGS
    Ch. 9. POINTERS AND REFERENCES
    Ch. 10. CLASSES
    Ch. 11. C++ SPECIAL FEATURES: ERRORS AND EXCEPTIONS AND OPERATOR OVERLOADING
    Ch. 12. INHERITANCE
    Ch. 13. IO STREAMING
    Ch. 14. GENERIC PROGRAMMING AND TEMPLATES
    Ch. 15. OBJECT-ORIENTED PROGRAMMING WITH JAVA
    Ch. 16. JAVA FUNDAMENTALS AND CONTROL LOOPS
    Ch. 17. SIMPLE IO AND ARRAYS AND STRINGS VECTORS
    Ch. 18. CLASS OBJECTS AND METHODS
    Ch. 19. INHERITANCE: PACKAGES: INTERFACES
    19.1 Introduction
    19.2 Basic Concepts of Inheritance
    19.3 Member Access Rules
    19.4 Using Super Class
    19.5 Methods Overriding
    19.6 Multilevel Inheritance
    19.7 Run-time Polymorphism
    19.8 Abstract Classes
    19.9 Using Final with Inheritance
    19.10 Object Class
    19.11 Packages
    19.12 Path and Classpath
    19.13 Importing of Packages
    19.14 Access Specifiers Revisited for Packages
    19.15 Interfaces
    19.16 Summary
    Exercise Questions
    Ch. 20. ERRORS AND EXCEPTIONS IN JAVA AND MULTITHREADED PROGRAMMING
    Ch. 21. JAVA IO FILES
    Ch. 22. NETWORKING IN JAVA
    Ch. 23. GRAPHICS USING SWING COMPONENTS AND APPLETS
    Ch. 24. COLLECTIONS AND SOFTWARE DEVELOPMENT USING JAVA
    Appendix A: ASCII Table
    Appendix B: Number Systems
    Appendix C: NetBeans IDE
    Index
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    Chapter 19. INHERITANCE: PACKAGES: INTERFACES

    Chapter 19. INHERITANCE: PACKAGES: INTERFACES

    LEARNING OBJECTIVES

    At the end of this chapter, you will be able to understand and use concepts and programs relating to

    • Extending a class from an existing class, concepts in multilevel inheritance.

    • Super- and subclass and overriding of superclass methods.

    • Run-time polymorphism and abstract class.

    • Packages and their usage.

    • Interfaces.



      

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