Singleton Design Pattern for Utility Clases

public class DateUtility{

  private static DateUtility instance;
     
  public static DateUtility getInstance() {
   synchronized (DateUtility.class) {
     if (instance == null) {
       instance = new DateUtility();
     }
}
return instance;
}

 public String convertDateToString(Date date) {
.......................................
}

}


Usage: DateUtility.getInstance().convertDateToString();