Java Runtime Environment (JRE) may be installed in family or static modes. This document describes various scenarios to demonstrate the behavior of the JRE update process starting in the Java SE 6 update 10 release. Release 6u10, 6u11, 6u12, and above are considered to be in the same family. Earlier updates of Java SE 6 do not support the ability patch in place.
This is the most likely scenario.