You can use Unified Modeling Language (UML) class diagrams to create
implements relationships between Java™ classes and interfaces.
You cannot create an implements relationship between a class and an
interface if such a relationship already exists between the two.
To create an implements relationship between a Java class
and a Java interface:
- In the Palette, click Implements.
- Click a Java class, drag it to a Java interface,
and release the mouse button.