출처1 :&nbsp;<a href="https://coderanch.com/t/386398/java/System-Timezone" target="_blank" class="tx-link">https://coderanch.com/t/386398/java/System-Timezone</a>출처2 :&nbsp;<a href="https://stackoverflow.com/questions/6567923/timezone-conversion#6567960" target="_blank" class="tx-link">https://stackoverflow.com/questions/6567923/timezone-conversion#6567960</a> <div class="txc-textbox" style="border-style: solid; border-width: 1px; border-color: rgb(254, 254, 184); background-color: rgb(254, 254, 184); padding: 10px;">//get local timezone id

TimeZone
tz = Calendar.getInstance().getTimeZone();

System.out.println(tz.getDisplayName());
// (i.e. Moscow Standard Time)

System.out.println(tz.getID()); // (i.e. Europe/Moscow)</div> <div class="txc-textbox" style="border-style: solid; border-width: 1px; border-color: rgb(254, 254, 184); background-color: rgb(254, 254, 184); padding: 10px;">//convert timezone

Calendar
localTime = Calendar.getInstance();

localTime.set(Calendar.HOUR,
17);

localTime.set(Calendar.MINUTE,
15);

localTime.set(Calendar.SECOND,
20);

&nbsp;

int hour
= localTime.get(Calendar.HOUR);

int minute
= localTime.get(Calendar.MINUTE);

int second
= localTime.get(Calendar.SECOND);

&nbsp;

System.out.printf("Local
time&nbsp; : %02d:%02d:%02d\n",
hour, minute, second);

&nbsp;

Calendar
germanyTime = new
GregorianCalendar(TimeZone.getTimeZone("Germany"));

germanyTime.setTimeInMillis(localTime.getTimeInMillis());

hour
= germanyTime.get(Calendar.HOUR);

minute
= germanyTime.get(Calendar.MINUTE);

second
= germanyTime.get(Calendar.SECOND);

&nbsp;

System.out.printf("Germany
time: %02d:%02d:%02d\n", hour,
minute, second);

&nbsp;&nbsp;&nbsp;
&nbsp; &nbsp;&nbsp;</div>

[Java] 타임존 아이디 가져오기, 타임존 컨버팅 get local timezoneid and convert