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Static keyword usage in Java:

1, static member variable: All objects share one copy. It can be called with the class name, or it can be called with the object name.

2, static function: can be called with the class name, or can be called with the object name. Note, however, that non-static member variables cannot be used inside a function. Because a non-static member variable is related to an object, the static function does not recognize which object it is.

3, Static code block: The following

class person{    static  String name;     int Age ;      Public Static void m () {        System.out.println ("I am a static function")    ;    } Static {        System.out.println ("I am a static code block");}    }

is automatically called when the class is loaded, and is used primarily to initialize some static member variables.

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