Java Day getLastDay(String nowdate, String inFormat, String outFormat)

Description

get Last Day

License

Apache License

Declaration

public static String getLastDay(String nowdate, String inFormat, String outFormat) throws ParseException 

Method Source Code

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

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class Main {
    private static Map<String, SimpleDateFormat> formats = new HashMap();

    public static String getLastDay(String nowdate, String inFormat, String outFormat) throws ParseException {
        String returndate = "";

        Date date = getDateFromString(nowdate, inFormat);

        Calendar cl = Calendar.getInstance();
        cl.setTime(date);//w w  w. j  a v a  2 s  .com
        switch (cl.get(2)) {
        case 0:
            cl.set(5, 31);
            break;
        case 1:
            int year = cl.get(1);

            if (isLeapYear(year))
                cl.set(5, 29);
            else {
                cl.set(5, 28);
            }
            break;
        case 2:
            cl.set(5, 31);
            break;
        case 3:
            cl.set(5, 30);
            break;
        case 4:
            cl.set(5, 31);
            break;
        case 5:
            cl.set(5, 30);
            break;
        case 6:
            cl.set(5, 31);
            break;
        case 7:
            cl.set(5, 31);
            break;
        case 8:
            cl.set(5, 30);
            break;
        case 9:
            cl.set(5, 31);
            break;
        case 10:
            cl.set(5, 30);
            break;
        case 11:
            cl.set(5, 31);
        }

        date = cl.getTime();

        returndate = getFormatTimeString(date, outFormat);

        return returndate;
    }

    public static Date getDateFromString(String date, String pattern) throws ParseException {
        SimpleDateFormat sDateFormat = getDateFormat(pattern);

        synchronized (sDateFormat) {
            return sDateFormat.parse(date);
        }
    }

    public static boolean isLeapYear(int year) {
        if (year % 400 == 0)
            return true;
        if (year % 4 == 0) {
            return (year % 100 != 0);
        }

        return false;
    }

    public static String getFormatTimeString(Date date, String pattern) {
        SimpleDateFormat sDateFormat = getDateFormat(pattern);

        synchronized (sDateFormat) {
            return sDateFormat.format(date);
        }
    }

    public static SimpleDateFormat getDateFormat(String pattern) {
        SimpleDateFormat sDateFormat = (SimpleDateFormat) formats.get(pattern);
        if (sDateFormat == null) {
            sDateFormat = new SimpleDateFormat(pattern);
            formats.put(pattern, sDateFormat);
        }
        return sDateFormat;
    }
}

Related

1. getDayTime_End()
2. getLastDay()
3. getLastDay(Date date)
4. getLastDay(Date date)
5. getLastDay(Date date)
6. getLastDayOfQuarter(Date date)
7. getLastNDays(int aInN)
8. getLastTimeInDay(Date day)