Java Month Add addMonths2(String dateStr, int months)

Description

add Months

License

Apache License

Declaration

public static String addMonths2(String dateStr, int months) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.text.SimpleDateFormat;

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

import java.util.StringTokenizer;

public class Main {

    public static String addMonths2(String dateStr, int months) {
        Date date = getStrDateToDate(dateStr);
        date = addMonths(date, months);//from  w  ww  .j av  a 2 s.com
        date = addDays(date, -1);

        SimpleDateFormat formatter;
        formatter = new SimpleDateFormat("yyyy" + getDateSplit() + "MM" + getDateSplit() + "dd");
        String dateString = formatter.format(date);

        return dateString.trim();
    }

    public static Date getStrDateToDate(String dateStr) {
        String dateSplit = getDateSplit();
        if (dateSplit.equals("."))
            dateSplit = "\\.";
        StringTokenizer filter = new StringTokenizer(dateStr, dateSplit);
        int year = Integer.parseInt(filter.nextToken());
        int mon = Integer.parseInt(filter.nextToken()) - 1;
        int day = Integer.parseInt(filter.nextToken());

        Calendar cal = new GregorianCalendar(year, mon, day);
        return cal.getTime();
    }

    public static Date addMonths(Date date, int months) {
        Calendar cal = new GregorianCalendar();
        cal.setTime(date);
        cal.add(Calendar.MONTH, months);
        return cal.getTime();
    }

    public static String addMonths(String dateStr, int months) {
        Date date = getStrDateToDate(dateStr);
        date = addMonths(date, months);

        SimpleDateFormat formatter;
        formatter = new SimpleDateFormat("yyyy" + getDateSplit() + "MM" + getDateSplit() + "dd");
        String dateString = formatter.format(date);

        return dateString.trim();
    }

    public static Date addDays(Date date, int days) {
        Calendar cal = new GregorianCalendar();
        cal.setTime(date);
        cal.add(Calendar.DATE, days);
        return cal.getTime();
    }

    public static String addDays(String dateStr, int days) {
        Date date = getStrDateToDate(dateStr);
        date = addDays(date, days);

        SimpleDateFormat formatter;
        formatter = new SimpleDateFormat("yyyy" + getDateSplit() + "MM" + getDateSplit() + "dd");
        String dateString = formatter.format(date);

        return dateString.trim();
    }

    public static String getDateSplit() {
        return ".";
    }
}

Related

1. addMonths(Date date, int iMonthCount)
2. addMonths(Date date, int months)
3. addMonths(int updateInterval, String dateFormat)
4. addMonths(java.util.Date today, int monthsToAdd)
5. addMonths(String s, int month)
6. addMonthsAndDays(Date date, int months, int days)
7. addMonthTimetamp(long lTimeStamp, String _pattern, int month)
8. getEndOfMonth(Date currentDate)
9. getEndOfMonth(Date date)