Once a UML class is associated with a Java source by code reversal/generation, you can select from UML class the corresponding Java source file in NetBeans.
Selecting Java Source from UML Class
To open a Java source file from a UML class, right-click on the UML class in Diagram Navigator/Model Explorer/Class Repository or in diagram and select Select in Code from the popup menu. This opens the corresponding source file in code editor.
