Java is an Object-Oriented Language. As a language that has the Object Oriented feature, Java supports the following fundamental concepts:
- Polymorphism (多态性)
- Inheritance（继承）
- Encapsulation （封装）
- Abstraction （抽象）
- Classes （类）
- Objects （对象）
- Instance （实例）
- Method （方法）
- Message Parsing （消息解析）
In this chapter, we will look into the concepts Classes and Objects.
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Object - Objects have states(状态) and behaviors（行为）. Example: A dog has states - color, name, breed as well as behaviors -wagging, barking, eating. An object is an instance of a class.
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Class - A class can be defined as a template/blue print（蓝图） that describes（描述） the behaviors/states that object of its type support.