Howto UML: sub methods / calls / operations / procedures
methods, model, uml
Solution
You use a self-message, as in the following:
Note the "stacked" lifelines? Those are activation levels. It shows that the drive method calls startEngine, which then calls getKey followed by insertKey. I've left the returns implicit.
Problem
I'm not sure how to model sub-methods in UML sequence diagram. When in the execution of one method another method is called (from the same class). I tried to give an example below: How would you guys model this in UML (in a sequence diagram)? ``` .. car1.drive(); .. ``` ... in Car class: ``` .. drive(){ this.startEngine(); } startEngine(){ this.getKey(); this.insertKey(); } .. ``` a small begin: ``` objx car1 ---- ---- | | | drive() | |-------->| startEngine() | |------------. | | | | |<-----------. | | ``` But where comes the getKey() method? Must this be communicated via another sequence diagram? Or is there a way to include sub procedures?