Conversion between the java Data, String, Long three kinds of date type

     // DATE type is converted to a String
   // formatType format of MM-dd HH-yyyy: mm: ss // When Day HH yyyy dd month in MM mm minutes ss seconds
   // the Data Type of a Date time 
  public  static String dateToString (a Date Data, String formatType) {
   return  new new the SimpleDateFormat (formatType) .format (Data); 
  } 
 
  // Long type to a String
   // Long type currentTime time to convert
   // String to convert the type of time format formatType 
  public  static longToString String ( Long currentTime, String formatType)
   throws a ParseException { 
  a Date DATE = longToDate (currentTime, formatType); //Date type turn into long type 
  String strTime = dateToString (date, formatType); // date type turn into String 
  return strTime; 
  } 
 
  // String type to date type
   // String to convert type strTime time, formatType to convert format mM-dd HH-yyyy: mm: ss // yyyy Year mM month dd day
   // when HH mm minutes ss seconds,
   // strTime time format must be the same as formatType time format 
  public  static a date stringToDate (String strTime, formatType String)
   throws a ParseException { 
  the SimpleDateFormat Formatter = new new the SimpleDateFormat (formatType); 
  a Date DATE = null ; 
  DATE =formatter.parse (strTime);
   return DATE; 
  } 
 
  // Long to type Date
   // Long type currentTime time to convert
   // formatType time format to convert the MM-dd-HH YYYY: mm: SS // YYYY Year when mM month dd day HH mm ss a 
  public  static a date longToDate ( long currentTime, String formatType)
   throws a ParseException { 
  a date dateOld = new new a date (currentTime); // the type of milliseconds long life time of a date type 
  String sDateTime = dateToString (dateOld, formatType); // the type of date time into String 
  a Date date = stringToDate (sDateTime, formatType); //The type to type Date String 
  return DATE; 
  } 
 
  // String type to type long
   // String type of time to convert strTime
   // formatType time format
   // time format and the strTime must formatType same 
  public  static  long stringToLong (strTime String, String formatType)
   throws a ParseException { 
  a Date date = stringToDate (strTime, formatType); // String type turn into a date type 
  IF (date == null ) {
   return 0 ; 
  } the else {
   Long currentTime = dateToLong (date) ; //date type turn as a long 
  return currentTime; 
  } 
  } 
 
  // date type to type long
   // date type of date time to convert 
  public  static  long dateToLong (a Date date) {
   return date.getTime (); 
  }