Getting last day of the month

getLastDayOfTheMonth.java

/**
     * This method will return as a date string of the last day of the month.
     * @param month if 0 then we look for current month
     * @param format format in which date should be returned as a string
     * @return
     */
    public static String getEndOfTheMonth(int month, String format){
        SimpleDateFormat dateFormat = new SimpleDateFormat(format);
        Date today = new Date();
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(today);
        int lastDay = 0;
        //if month is 0 then we consider this as a current month
        if (month == 0 ){
            lastDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
        }else if (month > 0 && month <=12 ){
            calendar.set(Calendar.MONTH, month);
            lastDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
        }
        calendar.set(Calendar.DAY_OF_MONTH, lastDay);
        Date lastDayOfMonth = calendar.getTime();

        return dateFormat.format(lastDayOfMonth);

    }