Error: JavaFX runtime components are missing, and are required to run this

I tried to build the application using javafx ant build, generated jar file. But when I run the jar file, issue:
Error: JavaFX runtime components are missing, and are required to run this application.
The javafx-class-path: libs/h2.jar libs/jfxrt.jar libs/log4j.jar
Running the JAR file using:
java -jar app.jar
What could it be?

Which version of iTunes?
When you go to Programs control panel you can see as well as uninstall the current version.
I always uninstall Bonjour, MobileMe etc and itunes will ask if I want to reinstall those (no thanks).
itunes and many apps keep an installer cache so they can do a repair-reinstall without a full install again.
I'd install Microsoft Security Essentials 2.0 which is free and excellent.
Programs don't affect data. But if you don't have backups,  you are likely past due.
If you have any doubts about the integrity of your system, if you have had to do a hard power down and likely do have issues, you should / could / might want to do chkdsk on your hard drive (hard drive properties tools scan for errors).

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