Java Data Type How to - Switch timezone for Calendar/Date

Question

We would like to know how to switch timezone for Calendar/Date.

Answer

//from www.j  av a 2s.  c  o  m
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

public class Main {

  public static void main(String[] args) {

    DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:00Z");
    Calendar cal = Calendar.getInstance();
    cal.set(Calendar.YEAR, 2015);
    cal.set(Calendar.MONTH, Calendar.SEPTEMBER);
    cal.set(Calendar.DATE, 1);
    cal.set(Calendar.HOUR_OF_DAY, 12);
    cal.set(Calendar.MINUTE, 15);
    Date date = cal.getTime();
    System.out.println(date);
    TimeZone tz = TimeZone.getTimeZone("IST");
    dateFormat.setTimeZone(tz);
    String actual = dateFormat.format(date);

    System.out.println(actual);
  }
}

The code above generates the following result.