Java tutorial
//package com.java2s; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class Main { public static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd"; /** * This is a helper method for checking if the fromDate is later than the * toDate. This is necessary in case a user sends the dates with HTTP GET. * * @param fromDate * @param toDate * @return boolean */ public static boolean checkDates(String fromDate, String toDate) { String formatString = DEFAULT_DATE_FORMAT; SimpleDateFormat sdf = new SimpleDateFormat(formatString); Date date1 = null; Date date2 = null; try { date1 = sdf.parse(fromDate); date2 = sdf.parse(toDate); } catch (ParseException e) { return false; // The user hasn't specified any dates } if (!date1.before(date2)) { return true; // Return true if date2 is earlier than date1 } else { return false; } } }