Electronic Books

114
Part I: The Core Language
The objectInstance is a reference to an object, which implements the class that defines the
runtime property.
Static Fields
Static fields are characteristics that pertain to the class itself and not to its instances. A value set in a static
variable will be the same whichever the context it is used in is and as long as the execution doesn ??™ t come
to an end. They are conventionally used to store global values or to perform actions that rely only on the
passed parameters. In a certain measure they replace the needs for global functions as encountered in
procedural programming, with the plus of having a very clear context determined by the container class.
When a static field is referenced from inside the declaring class, it is possible to simply use its name
unless it conflicts with other identifiers; in that case, and always when the field is used outside its
declaring class, it is needed to prefix it with the class name, as in the following example.
class Main
{
static function main()
{
Sample.


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