Source sourceCreate;
        try {
            Map<String, Object> sourceParams = new HashMap<String, Object>();
            sourceParams.put("type", "klarna");
            sourceParams.put("amount", 500);
            sourceParams.put("currency", "gbp");

            Map<String, Object> klarnaParams = new HashMap<String, Object>();
            klarnaParams.put("product","payment");
            klarnaParams.put("purchase_country","GB");

            sourceParams.put("klarna", klarnaParams);

    /*
            Source.OrderItem item = new Source.OrderItem();
            item.setAmount((long) 500);
            item.setType("sku");
            item.setCurrency("gbp");
    */
            Map<String, Object> orderItem = new HashMap<String, Object>();
            orderItem.put("amount", 500);
            orderItem.put("type", "sku");
            orderItem.put("currency", "gbp");
            ArrayList<Object> items = new ArrayList<Object>();
            items.add(orderItem);

            Map<String, Object> orderParams = new HashMap<String, Object>();
            orderParams.put("items", items);

            sourceParams.put("source_order", orderParams);

            sourceCreate = Source.create(sourceParams);

        } catch (StripeException err) {
            System.out.println("Error :" + err.toString() + err.getCode());
            responseObject.setError(err.toString());
        } catch (Exception ex) {
            System.out.println("Error : " + ex.toString());
        }