Applets don't have access to most system properties for security reasons; it looks like the Apache Commons Logging library is not compatible with that. Generally that makes sense, since most logging goes to files, and applets can't access the local file system.
Ping & DNS - updated with new look and Ping home screen widget
Joined: Feb 05, 2010
so... how to solve this problem?
Joined: Mar 22, 2005
Do you need to use Spring?
Alternatively, if the applet really does so much that Spring is called for, then a signed applet (or JavaWebStart application) may be more appropriate. Signing would get around the security restrictions.