You can change collection types of Java™ associations (association relationships
in class diagrams).
You can change the collection type of an association only when the
association represents a Java field whose declared type is one of
the default collection types set in the Java to UML Mapping preferences.
To change a Java association collection type:
- In the diagram editor, right-click an association relationship;
then click .
- In the Select Type window, click a collection
type and click OK.