Java_ Access Control permissions

Java has four permissions, Private<default<protected<public

No.	Range	Private	Default	Protected	Public
1	Same package same class	√	√	√	√
2	Different classes of the same package		√	√	√
3	different bun types			√	√
4	Different packages not subclasses				√

java95% Follow the principle

property is defined using private

method uses the public definition

Naming conventions:

Class: First letter must be capitalized

Properties: The first letter of the letter is lowercase, and then each of the first letters of the word capital

Method: The first letter of the letter lowercase, and then each word First capital

Package Name: All letters all lowercase

Constants: All letters uppercase public static final String INFO = "Hello";

Java_ Access Control permissions