Java Month End getEndOfMonth(long date)

Description

Returns the date corresponding to the end of the month.

License

Open Source License

Parameter

Parameter	Description
date	Base date

Return

End of month.

Declaration

public static long getEndOfMonth(long date) 

Method Source Code

//package com.java2s;
import java.util.Calendar;

public class Main {
    private static Calendar CALENDAR = Calendar.getInstance();

    /**/*from   w  ww. j ava 2  s  . com*/
     * Returns the date corresponding to the end of the month.
     *
     * @param date Base date
     * @return End of month.
     */
    public static long getEndOfMonth(long date) {
        return getMonth(date, 1);
    }

    private static long getMonth(long date, int increment) {
        long result;
        Calendar calendar = CALENDAR;
        synchronized (calendar) {
            calendar.setTimeInMillis(date);
            if (increment == -1) {
                calendar.set(Calendar.DAY_OF_MONTH, 1);
                result = startOfDayInMillis(calendar.getTimeInMillis());
            } else {
                calendar.add(Calendar.MONTH, 1);
                calendar.set(Calendar.DAY_OF_MONTH, 1);
                calendar.set(Calendar.HOUR_OF_DAY, 0);
                calendar.set(Calendar.MILLISECOND, 0);
                calendar.set(Calendar.SECOND, 0);
                calendar.set(Calendar.MINUTE, 0);
                calendar.add(Calendar.MILLISECOND, -1);
                result = calendar.getTimeInMillis();
            }
        }
        return result;
    }

    /**
    * Returns day in millis with the hours, milliseconds, seconds and minutes
    * set to 0.
    *
    * @param date long used in calculating start of day
    * @return Start of <code>date</code>
    */
    public static long startOfDayInMillis(long date) {
        Calendar calendar = CALENDAR;
        synchronized (calendar) {
            calendar.setTimeInMillis(date);
            calendar.set(Calendar.HOUR_OF_DAY, 0);
            calendar.set(Calendar.MILLISECOND, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MINUTE, 0);
            return calendar.getTimeInMillis();
        }
    }
}

Related

1. endOfMonth(Date date)
2. endOfMonth(Date date)
3. getEndOfMonth(Date date)
4. getEndOfMonth(Date dt)