Java Day in Month getDaysOfMonth(Date startdate, Date enddate, String month)

Description

get Days Of Month

License

Open Source License

Declaration

static public int getDaysOfMonth(Date startdate, Date enddate, String month) throws Exception 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.text.ParseException;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class Main {
    /**/*from   w  ww .j a  va 2 s .  c o  m*/
     * format pattern : yyyy-MM-dd
     */
    public static final SimpleDateFormat FORMAT_YYYY_MM_DD = new SimpleDateFormat("yyyy-MM-dd");

    static public int getDaysOfMonth(Date startdate, Date enddate, String month) throws Exception {
        Calendar cs = Calendar.getInstance();
        cs.setTime(startdate);
        Calendar ce = Calendar.getInstance();
        ce.setTime(enddate);
        //int startmonth = startdate.getMonth() + 1;
        //int endmonth = enddate.getMonth() + 1;
        int startmonth = cs.get(Calendar.MONTH) + 1;
        int endmonth = ce.get(Calendar.MONTH) + 1;
        int m = Integer.parseInt(month);
        //int day = getLastDay(String.valueOf(startdate.getYear()), month)
        //.getDate();
        Date ld = getLastDay(String.valueOf(cs.get(Calendar.YEAR)), month);
        Calendar c = Calendar.getInstance();
        c.setTime(ld);
        int day = c.get(Calendar.DAY_OF_MONTH);
        if ((startmonth < m) && (m < endmonth)) {
            return day;
        } else if (m == startmonth) {
            //return day - startdate.getDate() + 1;
            return day - cs.get(Calendar.DAY_OF_MONTH);
        } else if (m == endmonth) {
            //return enddate.getDate();
            return ce.get(Calendar.DAY_OF_MONTH);
        }
        return 0;
    }

    static public Date getLastDay(String year, String month) throws ParseException {
        Date date = FORMAT_YYYY_MM_DD.parse(year + "-" + month + "-1");

        Calendar scalendar = new GregorianCalendar();
        scalendar.setTime(date);
        scalendar.add(Calendar.MONTH, 1);
        scalendar.add(Calendar.DATE, -1);
        date = scalendar.getTime();
        return date;
    }

    static public Date getLastDay(int year, int month) throws ParseException {
        Date date = FORMAT_YYYY_MM_DD.parse(year + "-" + month + "-1");

        Calendar scalendar = new GregorianCalendar();
        scalendar.setTime(date);
        scalendar.add(Calendar.MONTH, 1);
        scalendar.add(Calendar.DATE, -1);
        date = scalendar.getTime();
        return date;
    }

    static public Date getLastDay(Date date) {
        Calendar c = Calendar.getInstance();
        c.setTime(date);
        c.set(Calendar.DAY_OF_MONTH, 1);
        c.roll(Calendar.DATE, false);
        return c.getTime();
    }
}

Related

1. getDaysInMonth(int month, int year)
2. getDaysInMonth(int month, int year)
3. getDaysInMonth(int monthNum)
4. getDaysInMonth(int year, int month)
5. getDaysInMonths()
6. getFirstDayOfMonth(int year, int month)
7. getFirstdayOfMonth(String year, String month)
8. getLastDayInMonth(int month, int year)
9. getLastDayOfMonth(int year, int month)