The Java Tutorial Fourth Edition: A Short Course on the Basics

Chapter 2. Object-Oriented Programming Concepts IF you've never used an object-oriented programming language before, you'll need to learn a few basic concepts before you can begin writing any code. This chapter will introduce you to object...

What Is an Object? Objects are key to understanding object-oriented technology. Look around right now and you'll find many examples of real-world objects: your dog, your desk, your television set, your bicycle. Real-world objects share two charac...

What Is a Class? In the real world, you'll often find many individual objects all of the same kind. There may be thousands of other bicycles in existence, all of the same make and model. Each bicycle was built from the same set of blueprints and t...

What Is Inheritance? Different kinds of objects often have a certain amount in common with each other. Mountain bikes, road bikes, and tandem bikes, for example, all share the characteristics of bicycles (current speed, current pedal cadence, curr...

What Is an Interface? As you've already learned, objects define their interaction with the outside world through the methods that they expose. Methods form the object's interface with the outside world; the buttons on the front of your television ...

What Is a Package? A package is a namespace that organizes a set of related classes and interfaces. Conceptually you can think of packages as being similar to different folders on your computer. You might keep HTML pages in one folder, images in a...

Questions and Exercises: Object-Oriented Programming Concepts Questions 1.Real-world objects contain ___ and ___.2.A software object's state is stored in ___.3.A software object's behavior is exposed through ___.4.Hiding internal data from the ...