Parsing JSON : Googlebooks JSON file getting specific identifier

Question

I'm writing an application that queries Google Books and it will parse the JSON file and display the title and author and the ISBN_10 identifier of the book. For example I'm trying to parse the JSON file from the following link. What I had achieved so far is getting the title and author of the book which is fine. One of the main thing I wanted to do is to get the ISBN 10 number which in this case is "1558607129". So far using my current code it returns the following result:

{"type":"ISBN_10", "identifier":"1558607129"}
{"type":"ISBN_13", "identifier":"9781558607125"}

The above result shows that the function parsed everything within the "industryIdentifiers" JSON array which I do not want. I only want "1558607129".

Here is the function for parsing the JSON so far:

public void parseJson(String stringFromInputS)
{
    try 
    {
        JSONObject jsonObject= new JSONObject(stringFromInputS);

        JSONArray jArray = jsonObject.getJSONArray("items");
        for(int i = 0; i < jArray.length(); i++)
        {
            JSONObject jsonVolInfo = jArray.getJSONObject(i).getJSONObject("volumeInfo");
            String bTitle = jsonVolInfo.getString("title");

            JSONArray bookAuthors = jsonVolInfo.getJSONArray("authors");
            for(int j = 0; j < bookAuthors.length(); j++)
            {
                String bAuthor = bookAuthors.getString(i);
            }

            JSONArray jsonIndustrialIDArray = jsonVolInfo.getJSONArray("industryIdentifiers");
            for(int k = 0; k < jsonIndustrialIDArray.length(); k++)
            {
               String isbn10 = isbn10 + "\n" + jsonIndustrialIDArray.getString(k);
            }
       }
    }
}

So what I want to do is to grab specifically the ISBN_10 identifier and just that. And in this case it is "1558607129". I would like to know how to specify to just parse the isbn_10 number or if someone could point me to the right direction in doing so.

Thank you.

Answer 1

Maybe something like that?

JSONArray jsonIndustrialIDArray = jsonVolInfo.getJSONArray("industryIdentifiers");
for(int k = 0; k < jsonIndustrialIDArray.length(); k++) {
    JSONObject isbn = jsonIndustrialIDArray.getJSONObject(k);
    if (isbn.getString("type").equals("ISBN_10")) {
         String isbn10 = isbn.getString("identifier");
         break;
    }
}