By the Java SE Platform Support Team, August 2016
.../jre/lib/zi) as part of the Java Runtime Environment (JRE) software. Applying whatever operating system timezone patches (for example Solaris OS, Linux, Windows) will have no effect on the accuracy of the Java SE platform's timezone data.
Yes. Before running the TZupdater tool to update timezone data, you should stop all the relevant instances of the JRE software. Cached instances of timezone data might exist in running JRE software processes if you do not shut down the JRE software before running the tool.
Restart the JRE software after the TZupdater tool has completed its work.
Timezone information specific to the Java platform:
The following external links provide general information about timezones and DST: