Java Learning Codex (5) modifier

Java modifiers are divided into access modifiers and non-access modifiers

Access modifiers

• Visible packages, default. No modification is required??。

• The Visible class (private).

• Visible World (public).

• Visible package and all subclasses (protected).

Non-access modifiers

• The static modifier is used to create methods and variables for a class

• The final modifier class is finally determined, and the methods and variables are implemented.

• The abstract modifier is used to create abstractions for classes and methods.

• synchronized and the volatile modifier This is used for threading.

　　　　

Java Learning Codex (5) modifier