Java tutorial
//package com.java2s; import java.util.Calendar; import java.util.TimeZone; public class Main { public static String getTimeString(long millitm) { Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("GMT")); cal.setTimeInMillis(millitm); return (setZeroPad(cal.get(Calendar.HOUR)) + ":" + setZeroPad(cal.get(Calendar.MINUTE)) + ":" + setZeroPad(cal.get(Calendar.SECOND))); } private static String setZeroPad(int value) { if (value < 10) { return "0" + Integer.toString(value); } return Integer.toString(value); } }