UML Class Diagrams for Java Programmers. There are a vast number of details and adornments that can be added to UML class diagrams.
Most of the time these details and adornments should not be added. But there are times when they can be helpful. Class stereotypes Class stereotypes appear between guillemet 3 characters, usually above the name of the class. We have seen them before. Free UML Tool with full UML, ERD and SysML Supports. Allen Holub's UML Reference Card. Collaboration (renamed "Communication" in UML2) Diagrams are an alternative presentation of a sequence diagram.
They tend to be more compact, but harder to read, than the equivalent sequence diagrams. The example at left is identical in meaning to the Sequence-Diagram example at the end of the previous section. Object Management Group - UML.