public void setTimeZone(TimeZone time_zone)

// Java code to illustrate
// getTimeZone() method
  
import java.text.*;
import java.util.*;
  
public class DateFormat_Demo {
    public static void main(String[] argv)
    {
        // Initializing the first formatter
        DateFormat DFormat
            = DateFormat.getDateInstance();
  
        // Converting the dateformat to string
        String str = DFormat.format(new Date());
  
        // Original TimeZone
        System.out.println(
            "The original timezone is: "
            + DFormat.getTimeZone()
                  .getDisplayName());
  
        TimeZone time_zone
            = TimeZone.getTimeZone("GMT");
  
        // Modifying the time zone
        DFormat.setTimeZone(time_zone);
  
        // Getting the modified timezones
        System.out.println(
            "New TimeZone is: "
            + DFormat.getTimeZone()
                  .getDisplayName());
    }
}

The original timezone is: Coordinated Universal Time
New TimeZone is: Greenwich Mean Time

// Java code to illustrate
// getTimeZone() method
  
import java.text.*;
import java.util.*;
  
public class DateFormat_Demo {
    public static void main(String[] argv)
    {
        // Initializing the first formatter
        DateFormat DFormat
            = DateFormat.getDateInstance();
  
        // Converting the dateformat to string
        String str = DFormat.format(new Date());
  
        // Original TimeZone
        System.out.println(
            "The original timezone is: "
            + DFormat.getTimeZone()
                  .getDisplayName());
  
        TimeZone time_zone
            = TimeZone.getTimeZone("Pacific/Tahiti");
  
        // Modifying the time zone
        DFormat.setTimeZone(time_zone);
  
        // Getting the modified timezones
        System.out.println(
            "New TimeZone is: "
            + DFormat.getTimeZone()
                  .getDisplayName());
    }
}

The original timezone is: Coordinated Universal Time
New TimeZone is: Tahiti Time