Android Date Interval Get getIntervalYears(Date date1, Date date2)

Description

get Interval Years

Declaration

public static int getIntervalYears(Date date1, Date date2) 

Method Source Code

//package com.java2s;

import java.util.Calendar;
import java.util.Date;

public class Main {
    public static int getIntervalYears(Date date1, Date date2) {
        Calendar firstCal = Calendar.getInstance();
        Calendar secondCal = Calendar.getInstance();

        firstCal.setTime(date1);/*from  www .  ja v  a 2 s. c  om*/
        secondCal.setTime(date2);

        int year = firstCal.get(Calendar.YEAR)
                - secondCal.get(Calendar.YEAR);
        int month = firstCal.get(Calendar.MONTH)
                - secondCal.get(Calendar.MONTH);
        int day = firstCal.get(Calendar.DAY_OF_MONTH)
                - secondCal.get(Calendar.DAY_OF_MONTH);

        year = year
                - ((month > 0) ? 0 : ((month < 0) ? 1
                        : ((day >= 0 ? 0 : 1))));
        month = (month < 0) ? (day > 0 ? 12 + month : 12 + month - 1)
                : (day >= 0 ? month : month - 1);

        firstCal.add(Calendar.MONTH, -1);
        day = (day < 0) ? (perMonthDays(firstCal)) + day : day;
        int timeStr = year;
        return timeStr;

    }

    public static int perMonthDays(Calendar cal) {
        int maxDays = 0;
        int month = cal.get(Calendar.MONTH);
        switch (month) {
        case Calendar.JANUARY:
        case Calendar.MARCH:
        case Calendar.MAY:
        case Calendar.JULY:
        case Calendar.AUGUST:
        case Calendar.OCTOBER:
        case Calendar.DECEMBER:
            maxDays = 31;
            break;
        case Calendar.APRIL:
        case Calendar.JUNE:
        case Calendar.SEPTEMBER:
        case Calendar.NOVEMBER:
            maxDays = 30;
            break;
        case Calendar.FEBRUARY:
            if (isLeap(cal.get(Calendar.YEAR))) {
                maxDays = 29;
            } else {
                maxDays = 28;
            }
            break;
        }
        return maxDays;
    }

    public static boolean isLeap(int year) {
        boolean leap = false;
        if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
            leap = true;
        }
        return leap;
    }
}

Related

1. getInterval(String beginMonth, String endMonth)
2. getIntervalDays(Date minDate, Date maxDate)
3. getIntervalDays(String sd, String ed)
4. getIntervalHours(Date minDate, Date maxDate)
5. getIntervalMinutes(Date minDate, Date maxDate)
6. hoursBetweenDate(Date date1, Date date2)
7. millisecondsBetween(Date dt1, Date dt2)
8. millisecondsBetween(Date dt1, Date dt2)
9. minuteBetweenDate(Date date1, Date date2)