How can I show, that a method is synchronized in class diagram (UML)?

Question

I have created a class in java with a public static synchronized method.

How can I show that the public method (+) is synchronized in a class diagram?

Edit: I want to show this in the class diagram, that is important, No need for activity diagram. only CLASS diagram...

Answer 1

UML cannot handle synchronized by default, however, you can use stereotypes, this best described in this Visualizing the synchronization of Java-threads with UML paper with examples.

You may not be able to do this with class diagrams, but, you can do it with sequence diagrams.

Answer 2

You can try a user-defined notation with adding a note. Note for synchronized methods Example for synchronzed method