public void fillUpProductComboBox() {
		ArrayList<StockItem> productComboboxList = driver.getStockDB().getStockList();
		comboBoxItems.clear();
		itemsQuantity.clear();
		itemsPrice.clear();
		
		for (StockItem stockItem : productComboboxList) {
			String values[] = supplierComboBox.getSelectedItem().toString().split("\\t");
			if (stockItem.getProduct().getSupplier().getId()==(
					Integer.parseInt(values[1].trim()))) {
				comboBoxItems.add(stockItem.getProduct().getProductName());
				itemsPrice.add(stockItem.getProduct().getSupplierPrice());
				itemsQuantity.add(stockItem.getQuantity());
			}
		}
	
		productComboBox.setSelectedIndex(comboBoxItems.size() - 1);
		revalidate();
		repaint();
	}