public void setTimeZone(TimeZone time_zone)

// Java code to illustrate
// setTime() method
  
import java.util.*;
  
public class Calendar_Demo {
    public static void main(String[] args)
    {
  
        // Creating calendar object
        Calendar calndr = Calendar.getInstance();
  
        // Displaying the current time zone
        String tz_name = calndr.getTimeZone()
                             .getDisplayName();
  
        System.out.println("The Current Time"
                           + " Zone: " + tz_name);
  
        TimeZone time_zone
            = TimeZone.getTimeZone("GMT");
  
        // Modifying the time zone
        calndr.setTimeZone(time_zone);
  
        // Displaying the modified zone
        System.out.println("Modified Zone: "
                           + calndr.getTimeZone()
                                 .getDisplayName());
    }
}

The Current Time Zone: Coordinated Universal Time
Modified Zone: Greenwich Mean Time

// Java code to illustrate
// setTimeZone() method
  
import java.util.*;
  
public class Calendar_Demo {
    public static void main(String[] args)
    {
  
        // Creating calendar object
        Calendar calndr = Calendar.getInstance();
  
        // Displaying the current time zone
        String tz_name = calndr.getTimeZone()
                             .getDisplayName();
  
        System.out.println("The Current Time"
                           + " Zone: " + tz_name);
  
        TimeZone time_zone
            = TimeZone.getTimeZone("Pacific/Tahiti");
  
        // Modifying the time zone
        calndr.setTimeZone(time_zone);
  
        // Displaying the modified zone
        System.out.println("Modified Zone: "
                           + calndr.getTimeZone()
                                 .getDisplayName());
    }
}

The Current Time Zone: Coordinated Universal Time
Modified Zone: Tahiti Time