Computer Software

Object-Oriented Programming: Java

• Different objects may have common attributes and behaviors.
• For example, sedan, truck, and wagon have common attributes (color, style, make) and common behaviors (to start the engine, stop the engine, speed up).
• We would like to build up an inheritance relationship between the known objects and new objects.This is the way we would like to group similar things together.
• In object-oriented language(Java), we define classes of objects.
• A class is a template for multiple objects with similar features. The class car describes the features of all cars.
• Each class can have superclases and subclasses. Subclass inherits all the methods and variables from its superclasses.
• For example, car is a superclass of (sedan,truck, and wagon).