java modifier differences

Public can be accessed by all classes in the same project, with project visibility, maximum access rights
Private member variables and methods can only access classes that have class visibility in their defined classes
Protected can be accessed by a class in a package, accessed by subclasses from different packages in the same project)
The default (friendly) can be accessed by a class in a package. With package visibility

Steps for encapsulation:
Modify the visibility of a property-private
Create a public Getter/setter method for the property of the read (get) write (set) shortcut key: Shift+alt+s
To judge the legality of attribute value by adding attribute control statement in Getter/setter method

java modifier differences