Get first and last days by year

    /**
	 *  Get the first day of a year 
	 * @param year  year 
	 * @return Date
	 */
	public Date getFirstOfYear(int year){
		Calendar calendar = Calendar.getInstance();
		calendar.clear();
		calendar.set(Calendar.YEAR, year);
		return calendar.getTime();
	}
	/**
	 *  Get the date of the last day of a year 
	 * @param year  year 
	 * @return Date
	 */
	public Date getLastOfYear(int year){
		Calendar calendar = Calendar.getInstance();
		calendar.clear();
		calendar.set(Calendar.YEAR, year);
		calendar.roll(Calendar.DAY_OF_YEAR, -1);
		return calendar.getTime();
	}