About access modifiers

I am a java beginner. This time, I will output about access modifiers.

Q1: What is an access modifier?

・ Determines the accessible range for methods and variables. [Japanese translation] ** access **: Access, approach, entry and exit

Access scope of specific access modifiers (4)

① ** public **: Can be accessed from anywhere

② ** Modifier **: Only in the same package

③ ** private **: Only in the same class

④ ** protected **: Within the same package class or subclass

When to use access modifiers

There is no particular pattern because public and unqualified patterns are free. ** private ** and ** protected ** are unique.

・ Private: Used in places where access from the outside must be absolutely prevented (Places where personal information is acquired, etc.) It can only be accessed from the specified method.

・ Protect: Can only be used for variables or methods

** [Referenced site] ** https://www.sejuku.net/blog/22679

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