Chapter 5Class Design
OCA exam objectives covered in this chapter:
Working with Inheritance
- Describe inheritance and its benefits
- Develop code that demonstrates the use of polymorphism; including overriding and object type versus reference type
- Determine when casting is necessary
- Use super and this to access objects and constructors
- Use abstract classes and interfaces
In Chapter 1, “Java Building Blocks,” we introduced the basic definition for a class in Java. In Chapter 4, “Methods and Encapsulation,” we delved into constructors, methods, and modifiers, and showed how you can use them to build more structured classes. In this chapter, ...
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