Differences between objects, classes, and objects and classes in Java

The following is my personal understanding, and I want to hear others' opinions.

In my opinion, objects, classes, and JavaProgramThere are some differences between classes and objects in the design.

Object-oriented:
Class-in the concept, 'class' is a collection of similar things. In order to distinguish different clusters, such classes can be used as a template, in addition, you can add, modify, and reduce attributes to become different objects.
Object-the 'object' In the concept is a special case of 'class'. It corresponds to a specific thing. When a specific description of a 'class' is made, an object is formed.

These are all abstract concepts, and classes and objects in Java programming are much more specific.

Java programming:
Class -- inCodeWhen the 'class' keyword is used to declare a class, the class can be an abstract class and can be inherited, subclass can be changed or expanded to the attributes of the parent class to create a new class. Even in a specific class, it is only a class and will not become an object, in addition, subclass attributes can only be greater than or equal to the attributes of the parent class and cannot be reduced.
Objects in Java refer to objects in program calls. In order to be able to operate on a computer, some specific methods are required to instantiate a specific class and allocate memory space, this is the object of a specific class.