Java Month Get getMonthBegin(String strdate)

Description

get Month Begin

License

Apache License

Declaration

public static String getMonthBegin(String strdate) 

Method Source Code

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

import java.text.DateFormat;

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

public class Main {
    public static String getMonthBegin(String strdate) {
        Date date = parseDate(strdate);
        return format(addDate(null, 0), "yyyy-MM") + "-01";
    }/*from  w  w  w.j a  va  2 s  .  co m*/

    public static Date parseDate(String dateStr, String format) {
        Date date = null;
        try {
            SimpleDateFormat dateFormat = new SimpleDateFormat(format);

            date = dateFormat.parse(dateStr);
        } catch (Exception localException) {
        }
        return date;
    }

    public static Date parseDate(String dateStr) {
        return parseDate(dateStr, "yyyy-MM-dd");
    }

    public static String format(Date date, String format) {
        String result = "";
        try {
            if (date != null) {
                DateFormat dateFormat = new SimpleDateFormat(format);
                result = dateFormat.format(date);
            }
        } catch (Exception localException) {
        }
        return result;
    }

    public static String format(Date date) {
        return format(date, "yyyy-MM-dd");
    }

    public static Date addDate(Date date, int day) {
        Calendar calendar = Calendar.getInstance();
        long millis = getMillis(date) + day * 24L * 3600L * 1000L;
        calendar.setTimeInMillis(millis);
        return calendar.getTime();
    }

    public static long getMillis(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        return calendar.getTimeInMillis();
    }

    public static String getTime(Date date) {
        return format(date, "HH:mm:ss");
    }
}

Related

1. getMonth1D()
2. getMonthAdd(String operateDate, int flag)
3. getMonthAndDate()
4. getMonthBefore(Date d, int number)
5. getMonthBegin(String strdate)
6. getMonthByNow(int month)
7. getMonthCount(String from, String to)
8. getMonthDesc(Date month)
9. getMonthEnd(Date date)