What is class in java?

Java is an object-oriented programming language. In addition to basic data types, Java requires that every data type must be a class.

The object-oriented programming idea strives to make the description of things in computer language as consistent as possible with the original appearance of the thing in the real world, class (class ) and object (object) are the core concepts of the object-oriented method.

A class is a description of a certain type of thing, which is an abstract and conceptual definition; the object is an individual of the type of thing that actually exists, so it is also called an instance. The relationship between classes and objects is like the relationship between concepts and objects. A class is like a template, and an object is an instance of the template.

The main idea of ​​object-oriented is to regard objective things as objects with states and behaviors, and find the common states and behaviors of objects of the same type through abstraction to form classes.

Class declarations in Java all begin with class.

class 类名称 {
//声明成员变量
//声明成员方法
}

Simply put, class is the keyword that defines a class in java.

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