Oracle recommends that you use the latest Oracle Java SE platform JDK or JRE update release as the preferred means of delivering both timezone data updates and other product improvements, such as security fixes.To see which JDK or JRE update release incorporates the updated timezone data for your locale, see Timezone Data Versions in the JRE Software.In such cases, the user will see the following exception message: No SHA-512 hash file found: https://javadl-esd-secure.oracle.com/update/tzupdater/tzdata2014gz.sha512.
However, if you are unable to use Oracle's latest JDK or JRE update release or if the timezone data on the latest release is not the most current one available, the TZUpdater tool provides a means of updating timezone data while leaving other system configuration and dependencies unchanged.
If you have already run a previous version of the TZUpdater tool on your JDK/JRE software, you do not need to apply this version of the tool, unless your system requires the specific bug fixes described in Timezone Data Versions in the JRE Software.
A version of TZUpdater tool for updating the current version of Oracle’s Java Runtime Enviroment is available in Oracle Technology Network - Java SE Download Page.
Support customers can download a TZUpdater tool for older versions through My Oracle Support. The TZUpdater tool modifies the JDK/JRE software instance that is used to execute the tool.
You must stop any running instances of the JDK/JRE software to be operated upon before you run the TZUpdater tool on that installed JDK/JRE software image.