Java modifier public,private,protected and the default difference

The meaning of the access modifier in Java, public, private, PROTECTE, default, is explained:
Public (interface Access): The most restrictive modifier in the Java language, commonly referred to as "common". The classes, properties, and methods that are decorated are not only accessible across classes, but also across packages (package).
Private (You cannot access): The narrowest modifier for access restrictions in the Java language is generally referred to as "private". Classes, properties, and methods that are modified by them can only be accessed by objects of that class, their subclasses cannot be accessed, and cross-package access is not allowed.
Protected (inherited access): An access modifier between public and private, commonly referred to as a "protected form." Classes, properties, and methods that are modified by them can only be accessed by methods and subclasses of the class itself, even if the subclasses are accessible in different packages.
Default (Package access): That is, without any access modifiers, often referred to as the "Default access mode". In this mode, access is allowed only in the same package.
(In the Java language only ...) ）

Java modifier public,private,protected and the default difference