Some Background on OO and Java Concepts
Classes are abstract blueprints from which individual objects can be made. They define properties and behaviors (methods).
| A class is a template for defining the behaviors and properties for a particular type of object. |
In Table 15.1, we'll give an example of a class.
| Table 15.1 An Example of a Class | |
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| Concept | Example |
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| Class | car |
| Property | speed |
| Behavior | change gear |
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Using the blueprint shown in Table 15.1, we can create a car (object) that has a specific speed and is able to change gear. Interfaces define a set of methods but don't implement them.
| An interface is a special kind of class that defines a set of methods. |
A class can implement an interface, signing a kind of contract to provide (implement) the methods defined in the interface.