At the Department of Social and Family Affairs (DSFA) in Ireland, whose new Child Benefit Administration system is the largest implementation of a naked object system to date, not a single diagram ...

You typically have many sequence diagrams for a single class diagram because ... many of the elements of the UML have a precise mapping to the Java programming language, which is consistent ...

there is no Java language mapping that represents a UML object. A sequence diagram is a form of behavioral diagram that enables you to specify the interactions that exist between a set of objects.