您可以使用Eclipse 3.5的EclipseUML的30天评估版本:http://www.uml2.org/eclipse-java-galileo-SR2-win32_eclipseUML2.2_package_may2010.zip 这不是最新的3.6版本，但是非常好，并且不需要您购买它来进行测试和逆向工程。

反向工程:http://www.forum-omondo.com/documentation_eclipseuml_2008/reverse/reverse/reverse_engineering_example.html

现场flash演示:http://www.ejb3.org/reverse.swf

EclipseUML Omondo是世界上最好的Java工具。在这个实时java同步市场上，似乎只有eUML可以与之竞争，但是eUML在代码中添加了模型标签，这真的非常非常糟糕，对我来说是一个绝对的失败。

您可以使用Eclipse 3.5的EclipseUML的30天评估版本:http://www.uml2.org/eclipse-java-galileo-SR2-win32_eclipseUML2.2_package_may2010.zip 这不是最新的3.6版本，但是非常好，并且不需要您购买它来进行测试和逆向工程。

反向工程:http://www.forum-omondo.com/documentation_eclipseuml_2008/reverse/reverse/reverse_engineering_example.html

现场flash演示:http://www.ejb3.org/reverse.swf

EclipseUML Omondo是世界上最好的Java工具。在这个实时java同步市场上，似乎只有eUML可以与之竞争，但是eUML在代码中添加了模型标签，这真的非常非常糟糕，对我来说是一个绝对的失败。

我发现绿色插件非常简单，使用和生成类图从源代码。 试一试吧。 只需将插件复制到插件目录。

ObjectAid UML Explorer

是我用的。它很容易从存储库安装:

Name:     ObjectAid UML Explorer
Location: http://www.objectaid.com/update/current

并生成相当不错的UML图:

网站描述:

The ObjectAid UML Explorer is different from other UML tools. It uses the UML notation to show a graphical representation of existing code that is as accurate and up-to-date as your text editor, while being very easy to use. Several unique features make this possible: Your source code and libraries are the model that is displayed, they are not reverse engineered into a different format. If you update your code in Eclipse, your diagram is updated as well; there is no need to reverse engineer source code. Refactoring updates your diagram as well as your source code. When you rename a field or move a class, your diagram simply reflects the changes without going out of sync. All diagrams in your Eclipse workspace are updated with refactoring changes as appropriate. If necessary, they are checked out of your version control system. Diagrams are fully integrated into the Eclipse IDE. You can drag Java classes from any other view onto the diagram, and diagram-related information is shown in other views wherever applicable.

我注意到Intellij的SequenceDiagram插件也是一个不错的选择。

到目前为止，我用过的最好的逆向工程工具和往返java -> UML是Borland's Together。它是基于Eclipse的(不仅仅是一个插件)，而且工作得非常好。