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What's the difference between public, default, protected, and private in Java?

Damian99Damian99 USAPosts: 116Member

Please clarify when to use public, default, protected, and private in Java.

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Comments

  • FTLFTL Posts: 2Member

    I think these apply to members(variables and methods). They are used for access control.

    public= all other classes can access the variables/members. private= only that class can access the variables/members. default and proected are related to packages. default: only a class in the same package can access the members. protected - if i remember correctly- acts like private within a package, except for subclasses.

    For classes, you can only have public and non-public(default)

  • DavidMDavidM USAPosts: 342Member
    edited January 23
    Modifier    | Class | Package | Subclass | World
    ————————————+———————+—————————+——————————+———————
    public      |  ✔    |    ✔    |    ✔     |   ✔
    ————————————+———————+—————————+——————————+———————
    protected   |  ✔    |    ✔    |    ✔     |   ✘
    ————————————+———————+—————————+——————————+———————
    no modifier |  ✔    |    ✔    |    ✘     |   ✘
    ————————————+———————+—————————+——————————+———————
    private     |  ✔    |    ✘    |    ✘     |   ✘
    

    Official documentation.

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