Java Month Day getMonthFirstDay(Date date)

Description

get Month First Day

License

Open Source License

Declaration

public static Date getMonthFirstDay(Date date) 

Method Source Code

//package com.java2s;

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

public class Main {

    public static Date getMonthFirstDay(Date date) {
        Calendar c = Calendar.getInstance();
        c.setTime(date);//  ww  w . ja  v  a 2s. co m
        int year = c.get(Calendar.YEAR);
        int month = c.get(Calendar.MONTH);

        c.clear();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, month);
        c.set(Calendar.DAY_OF_MONTH, 1);

        return c.getTime();
    }

    public static String getTime(Calendar c) {
        return getDate(c.getTime(), "HH:mm:ss");
    }

    public static String getDate() {
        return getDate(getCurDate(), "yyyy-MM-dd");
    }

    public static String getDate(Date date, String format) {

        String dtstr = "";
        if (date == null) {
            return dtstr;
        }

        if (format == null || "".equals(format.trim())) {
            format = "yyyy-MM-dd";
        }

        SimpleDateFormat sdf = new SimpleDateFormat(format);
        dtstr = sdf.format(date);
        return (dtstr == null ? "" : dtstr);

    }

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

    public static Date getDate(long time) {

        Calendar c = getCurCalendar();
        c.setTimeInMillis(time);

        return c.getTime();
    }

    public static Date getCurDate() {
        return getCurCalendar().getTime();
    }

    public static Calendar getCurCalendar() {
        return Calendar.getInstance();
    }
}

Related

1. getMonthDay(int year, int month)
2. getMonthEndDay(String time)
3. getMonthEndDay(String yyyy, String mm)
4. getMonthFirstDay()
5. getMonthFirstDay()
6. getMonthFirstDay(String date)
7. getMonthFirstDay(T date)
8. getMonthFristWeekSunday(String month)
9. getMonthLastDay()