Development/Java & J2EE/TimeDifference Work out time difference in Days: Hours : Mins : Sec {code} /** * test getNumberOfWindowFirstPage */ public void testGetNumberOfWindowFirstPage() { Calendar cal = Calendar.getInstance(); System.out.println("Seconds: 15"); cal.add(Calendar.SECOND, 15); System.out.println(printDifference(cal.getTime())); System.out.println("min 1, 15sec"); cal.add(Calendar.MINUTE, 1); System.out.println(printDifference(cal.getTime())); System.out.println("Minutes: 59:15"); cal.add(Calendar.MINUTE, 58); System.out.println(printDifference(cal.getTime())); cal = Calendar.getInstance(); System.out.println("Minutes: 158"); cal.add(Calendar.MINUTE, 158); System.out.println(printDifference(cal.getTime())); cal = Calendar.getInstance(); System.out.println("Minutes: 1480"); cal.add(Calendar.MINUTE, 1480); System.out.println(printDifference(cal.getTime())); cal = Calendar.getInstance(); System.out.println("Minutes: 1830"); cal.add(Calendar.MINUTE, 1830); System.out.println(printDifference(cal.getTime())); cal = Calendar.getInstance(); System.out.println("Minutes: 4450"); cal.add(Calendar.MINUTE, 4450); System.out.println(printDifference(cal.getTime())); cal = Calendar.getInstance(); System.out.println("Minutes: -100"); cal.add(Calendar.MINUTE, -100); System.out.println(printDifference(cal.getTime())); cal = Calendar.getInstance(); System.out.println("2days::22hrs::33mins::15sec"); // cal.add(Calendar.DATE, 2); // cal.add(Calendar.HOUR, 22); cal.add(Calendar.MINUTE, 33); cal.add(Calendar.SECOND, 15); System.out.println(printDifference(cal.getTime())); } private String printDifference(Date upComing) { final int milli = 1000; final int sec = milli; final int min = 60 * milli; final int hour = 60 * min; final int day = 24 * hour; Date now = new Date(); String output = ""; //difference long difference = upComing.getTime() - now.getTime(); if (difference < 1) { return "0sec"; } //days long days = difference / day; System.out.println("days:" + days); // if (days > 1) { // output = output + " " + days + "days"; // } else if (days == 1) { // output = output + " " + days + "day"; // } if (days > 1) { output = output + " " + days + "d"; } //hours long hours = (difference % day) / hour; System.out.println("hours:" + hours); // if (hours > 1) { // output = output + " " + hours + "hrs"; // } else if (hours == 1) { // output = output + " " + hours + "hr"; // } if (hours > 1) { output = output + " " + hours + "h"; } //only do minutes and seconds if not days if (days == 0) { long mins = (difference % hour) / min; System.out.println("mins:" + mins); // if (mins > 1) { // output = output + " " + mins + "mins"; // } else if (mins == 1) { // output = output + " " + mins + "min"; // } output = output + " " + mins + "m"; if (hours == 0) { //only do secconds if no hours long secs = (difference % min) / sec; System.out.println("secs:" + secs); // if (secs > 1) { // output = output + " " + secs + "secs"; // } else if (secs == 1) { // output = output + " " + secs + "sec"; // } output = output + " " + secs + "s"; } } return output; } {code} 2006-08-13 11:31:37.0 2006-08-13 11:31:37.0