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());
int hour = local.get(Calendar.HOUR); // 5
int minutes = local.get(Calendar.MINUTE); // 0
int seconds = local.get(Calendar.SECOND); // 0
boolean am = local.get(Calendar.AM_PM) == Calendar.AM; // false
}
}