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java.lang.ClassCastException: java.lang.String cannot be cast to net.minidev.json.JSONObject 

    JSONParser jsonParser = new JSONParser();
    Object obj = jsonParser.parse(new FileReader(location.getAbsolutePath()));
    JSONObject jobj = (JSONObject) obj;
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it may be relate to your jar or dependency.I think your import should be like this import com.google.gson.Gson; after adding jar. – Anptk Apr 25 '15 at 7:53
up vote 1 down vote accepted

How does your input file look like?

If it's content is something like:

"some string"

then the call to jsonParser.parse() will return java.lang.String causing the subsequent failure of the cast to JSONObject.

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The content is a file from s3.amazonaws.com/Minecraft.Download/indexes/1.7.4.json – Neil D'souza Apr 25 '15 at 7:51
    
I just tried the following code on the file you linked: JSONParser jsonParser = new JSONParser(); Object obj = jsonParser.parse(new FileReader("1.7.4.json")); JSONObject jobj = (JSONObject) obj; System.out.println(((JSONObject) jobj.get("objects")).get("icons/icon_16x16.png")); and I got the following output: {"size":3665,"hash":"bdf48ef6b5d0d23bbb02e17d04865216179f510‌​a"}. are you sure you're still seeing that class-cast-exception? – Itay Maman Apr 25 '15 at 8:08

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