Java Month Day getMonthLastDay(String fmt)

Description

get Month Last Day

License

Apache License

Declaration

public static String getMonthLastDay(String fmt) 

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.HashMap;
import java.util.Map;

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

    public static String getMonthLastDay(String fmt) {
        String returndate = "";
        Date date = null;//from  w w  w .  jav  a 2 s.c  o m
        Calendar cl = Calendar.getInstance();
        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, fmt);

        return returndate;
    }

    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. getMonthLastDay()
2. getMonthLastDay()
3. getMonthLastDay()
4. getMonthLastDay(String curmonth, int month)
5. getMonthLastDay(String dateString)
6. getMonthMaxDay(String sDate)
7. getMonthWeek(String curday)
8. getMonthWeek(String curday)
9. getPreviosMonthFirstDay()