You can improve the user experience of your rich Internet application (RIA) using the best practices described in this topic.

• Optimize the size of JAR files and related resources so that your RIA can load quickly. See Reducing the Download Time for optimization techniques.
• Enable the version download protocol and use background update checks to enable your RIA to start quickly. See Avoiding Unnecessary Update Checks to learn more about the version download protocol and update checks.
• Sign JAR files only when absolutely necessary. See Signing JAR Files Only When Necessary to learn when to sign your RIA.
• Make sure that the client has the required version of the Java Runtime Environment software. See Ensuring the Presence of the JRE Software for details on how the Deployment Toolkit script can be used for this purpose.
• Preload your Java Web Start application, if possible. If you plan to deploy your RIA as a Java Web Start application in an enterprise where you have some administrative control, you can preload your application to various clients so that it is cached and ready to use. Use the following command to preload your Java Web Start application:

  javaws -import -silent