Conversion between java date int and String

/*** Time unix conversion * @ param timestampString * @ return */public static String TimeStampDate (String timestampString, String format) {Long timestamp = Long. parseLong (timestampString) * 1000; String date = new java. text. simpleDateFormat (format ). format (new java. util. date (timestamp); return date ;} /*** convert unix time to int type * @ param timeString * @ param format * @ return */public static int DateToInt (String timeString, String format) {int time = 0; try {SimpleDateFormat sdf = new SimpleDateFormat (format); Date date = sdf. parse (timeString); String strTime = date. getTime () + ""; strTime = strTime. substring (0, 10); time = Integer. parseInt (strTime);} catch (ParseException e) {e. printStackTrace ();} return time ;}