The package can also be used to provide Mathematica-enriched user interfaces to standalone Java applications, leveraging the fact that J/Link also works within a Java application environment. There is a sample custom application Java main class that demonstrates this within the GUIKit.jar: com.wolfram.guikit.app.GUIKitApplication. You can run any of the definitions you build as standalone Java applications if you add all .jar files required by to the classpath and have Mathematica installed on the machine that is running the application. Likewise, the entire standalone Java application does not have to be defined only by . You can easily load dialogs and panels built with to supplement your existing Java application.