** Make sure you have Maven and JDK Version >= 1.8 **
Clone/Download the repo then edit in controller / service / repository
# clone our repo or you can do fork for yourself
git clone https://github.com/adrianaden/world-time.git
# change directory to our repo
cd world-time
# install the repo with mvn
mvn install
# add dependency in your project
<dependency>
<groupId>org.adendrata.common</groupId>
<artifactId>worldtime</artifactId>
<version>1.0.1-SNAPSHOT</version>
</dependency>.....
long currentMillis = System.currentTimeMillis();
ZonedDateTime worldTimeUTC = WorldTime.of(currentMillis).toUTC();
ZonedDateTime worldTimeGMT5 = WorldTime.of(currentMillis).toGMT(5);
System.out.println(worldTimeUTC);
System.out.println(worldTimeGMT5);
output should be like this
2018-10-26T11:23:35.287Z[Etc/UTC]
2018-10-26T06:23:35.287-05:00[Etc/GMT+5]
Process finished with exit code 0
more: https://medium.com/@a.adendrata/how-to-convert-time-to-different-timezone-with-java-8-73d67dfbc5e6