The SILVERRUN ModelSphere Java Designer Kit (formerly SILVERRUN-JD) supports the creation of UML class diagrams. This UML tool has an especially good interface to Java. You can elaborate your project's static model graphically and the application will generate the classes for you to start programming. You can also automatically create your diagrams from reverse engineering Java source or compiled classes (including archives). The JDK module has rich utility functions such as a Java validation, accessor methods generation and an XMI import / export to exchange your models with other UML tools.