JV is an abbreviation for Java viruses.
JV was an abbreviation previously used by F-Secure Anti-Virus when detecting Java viruses. The naming scheme has been updated. F-Secure Anti-Virus now detects these with the name "Java". Please see the Java description for more information.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
JV/Ungrateful in ComSourceException.class is a false alarm from McAfee/ Network Associates scanner. For more information, contact Network Associates.