Java tutorial
//package com.java2s; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class Main { public static String formatTimestamp(String in) { SimpleDateFormat formater = new SimpleDateFormat("yyyy_MM_dd_hh_mm_ss"); Date date = null; try { date = formater.parse(in); } catch (ParseException e) { return ""; } SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy HH:mm:ss"); return sdf.format(date); } }