Decomposition:

Int stands for a type, and there are many basic data types in Java. They also have encapsulation classes, such as int and Integer.

When we initialize an integer, we use its base class int directly

I is the handle in the process of initializing this instance, and it is also the most important idea of Java. Object-oriented, then I am an object.

The equal sign is followed by the value.

Ask me online if you don't understand.

Similar to String str = "12"; This is a string!