When upgrading Release 5 Java DB to Release 5U1, consider the following aspects of the upgrade process:
General Upgrade Approach. The upgrade is achieved by patching Release 5 Java DB.
Upgrade Dependencies. Java DB has dependencies on a number of Java ES shared components (see Table 1–8), none of which need to be upgraded when you perform a maintenance upgrade of Java DB.
Backward Compatibility. Release 5UI Java DB is backwardly compatible with the Release 5 version.