Java Month Day getFirstDayOfMonth(Date date)

Description

get First Day Of Month

License

Apache License

Declaration

public static String getFirstDayOfMonth(Date date) 

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;

import java.util.HashMap;

import java.util.Map;

public class Main {
    private static final String dateFormat3 = "yyyy-MM-dd";
    private static final Map<String, DateFormat> DFS = new HashMap<String, DateFormat>();

    public static String getFirstDayOfMonth(Date date) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);/*from  w ww . j av a 2s  .  co  m*/
        cal.set(Calendar.DAY_OF_MONTH, cal.getMinimum(Calendar.DATE));
        return date2String(cal.getTime());
    }

    public static String date2String(Date date) {
        SimpleDateFormat formatter = new SimpleDateFormat(dateFormat3);
        String dateString = formatter.format(date);
        return dateString;
    }

    public static String format(Date date, String pattern) {
        if (date == null) {
            return null;
        }
        return getFormat(pattern).format(date);
    }

    public static DateFormat getFormat(String pattern) {
        DateFormat format = DFS.get(pattern);
        if (format == null) {
            format = new SimpleDateFormat(pattern);
            DFS.put(pattern, format);
        }
        return format;
    }
}

Related

1. getFirstDayOfCurrentMonth()
2. getFirstDayOfLastMonth()
3. getfirstDayOfMonth()
4. getFirstDayOfMonth(Calendar c)
5. getFirstDayOfMonth(Date date)
6. getFirstDayOfMonth(Date date)
7. getFirstDayOfMonth(Date date)
8. getFirstDayOfMonth(Date date)
9. getFirstDayOfMonth(Long date)