The method add(String) is undefined for the type String (JSONObject 2nd Array)

问题

After reciving the Data from the PHP-File with a MySQL-query, I want to fill two Array with the data. The first Array works:

results.add((String) json_data.get("product") + "\n" + json_data.get("owner"));

But when I add the second Array:

mysql_id.add((String) json_data.get("id")); 

Eclipse displays a Error:

The method add(String) is undefined for the type String

There a no suggestions available and I dont know the Problem. I have "mysql_id" everywhere declard as "results" but it doesnt work!

Thanks for Help!

回答1:

you have to use like this

mysql_id.add(getString("id")); 

来源：https://stackoverflow.com/questions/12620166/the-method-addstring-is-undefined-for-the-type-string-jsonobject-2nd-array