public Boolean addDVD(String title, int year, String style, int amount, double buyPrice, double rentPrice) {
		boolean sell;
		if (amount > DVD.getSELL_LIMIT()) {
			sell = true;
		} else {
			sell = false;
		}
		boolean rent;
		if (amount > DVD.getRENT_LIMIT()) {
			rent = true;
		} else {
			rent = false;
		}
		ArrayList<Long> tAL = new ArrayList<Long>();
		if (style != null) {
			String[] tString = style.split(" ");
			for (String a : tString) {
				if (!a.equals("")) {
					tAL.add( this.addStyleRID(a) );
				}
			}
		}
		// 
		for (DVD a : this.dVDMainDateArrayList) {
			if ( a.getTitle().equals(title) && a.getYear() == year ) {
				return false;
			}
		}
		dVDMainDateArrayList.add( new DVD(title, year, tAL, amount, sell, rent, buyPrice, rentPrice));
		return true;
	}