When do you use the static method?

Obj x = new Obj();
x.someMethod

Obj.someMethod

Which is the static call method?

To make the object callable only when it is created, you can just create it in the normal method.

Static methods are literally methods that already exist in memory when a class is defined. Therefore, the method exists and is callable even if the object of the class is not created. Instead, it does not access the object's variables. Because the variable of an object exists only when the object is created.