In modeling context: How to call a method that placed outside class

Question

For example if method A return either 0 or 1 .

If method A returns 1 then it should call method B.

How to visualize this in Class Diagram ?

Answer 1

class diagrams are static diagrams, you can not show the behavior in a class diagram. You have to do a sequence or activity diagram.

see sparx tutorial or eclipse tutorial For your case, an opt combined fragment should do the job.