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Create a Calendar object with the local time zone and set the UTC from japanCal

import java.util.Calendar; import java.util.GregorianCalendar; import java.util.TimeZone; public class Main {   public static void main(String[] argv) throws Exception {     Calendar japanCal = new GregorianCalendar(TimeZone.getTimeZone("Japan"));     japanCal.set(Calendar.HOUR_OF_DAY, 10); // 0..23     japanCal.set(Calendar.MINUTE, 0);     japanCal.set(Calendar.SECOND, 0);     Calendar local = new GregorianCalendar();     local.setTimeInMillis(japanCal.getTimeInMillis());   } }