Here you can find the source of timeDifferenceInSeconds(Date startDate, Date endDate)
public static Long timeDifferenceInSeconds(Date startDate, Date endDate)
//package com.java2s; //License from project: Apache License import java.util.Calendar; import java.util.Date; public class Main { private Calendar calendar; private static final String COLON = ":"; private static final String ZERO = "0"; public static Long timeDifferenceInSeconds(Date startDate, Date endDate) { if (startDate == null || endDate == null) { return null; }//from w w w . j a v a 2s . c o m return (endDate.getTime() - startDate.getTime()) / (1000L); } public String getTime() { return getHour() + COLON + getMinute(); } public int getHour() { return calendar.get(Calendar.HOUR_OF_DAY); } public String getMinute() { int tempMinute = calendar.get(Calendar.MINUTE); return tempMinute < 10 ? ZERO + tempMinute : Integer.toString(tempMinute); } }