Flutter use variable from another class

Static variables reduce the amount of memory used by a program . Static variables are shared among all instances of a class. Non static variables are specific to that instance of a class. Static variable is like a global variable and is available to all methods.

Dart Static Variable These are the member of the class instead of a specific instance . The static variables are treated the same for all instances of the class; it means a single copy of the static variable is shared among all instances of classes.

The static variable can be used to refer to the common property of all objects (which is not unique for each object) , for example, the company name of employees, college name of students, etc. The static variable gets memory only once in the class area at the time of class loading.