On the definition of classes and objects in Java programming

1. What is class?

A: classes are objective, abstract and conceptual things.

2. What's the object?

A: the object is concrete and practical, representing a thing. For example, a car is a class, and cars and bicycles are its objects.

Description of class and object: class is the template of object, and object is an individual of class.

3. How to define class methods in Java?

4. Object definition method?

1. Object declaration: class name object name;

2. Object creation object name = new class name (); New: allocate memory space.

It can also be written as: class name object name = new class name ();

5. Example: create an air conditioner and call refrigeration.

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