[FIXED] Unable to parse int the string value

Issue

Hi I am trying to get value of a string into a integer type like bellow

private void updateTotalQuantity() {
    int quantity = 0;
    double price=0.0;
    Double totalPrice = 0.0;
    List<ProductDetail> products = mProductsAdapter.getProducts();

    for (ProductDetail product : products) {
        if (product.getQuantity() != null)
        {
            quantity += (Integer.parseInt(product.getQuantity()));
        }
        if (product.getPrice()!=null && product.getQuantity() != null)
        {
            price = Double.parseDouble(product.getPrice());
            totalPrice = totalPrice + (price * Double.parseDouble(product.getQuantity()));
        }

    }
    totalQty.setText(String.valueOf(quantity));
    totalOrder.setText(String.valueOf(totalPrice));
}

When I run my application the app crashes at point quantity += (Integer.parseInt(product.getQuantity())); with execption message

java.lang.NumberFormatException: For input string: "null"

How can I get rid of this ?

Any help would be highly appreciated.

Solution

You are doing a null-check in

if (product.getQuantity() != null)

but your string is initialized and its value actually is "null" as a string. Wherever your data is coming from, the Adapter most likely parses empty fields into "null" instead of null.

Either, you check against "null", too:

if (product.getQuantity() != null && product.getQuantity() != "null")

or you change the adapter so that it actually returns null on an empty field.

Answered By - Torge Rosendahl
Answer Checked By - Katrina (JavaFixing Volunteer)