JAVA - json parser - keys() to parse unknown json format?

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I try to parse a simple json dictionary, so I read many tutorials and threads on how to achieve this

but there is no "keys()" nor "keySet()" defined for JSONObject nor JSONArray

I downloaded the library here :

http://www.java2s.com/Code/Jar/j/Downloadjsonsimple111jar.htm

I am starting to wonder if I use the right library

here is my code :

import org.json.simple.parser.ParseException;
import org.json.simple.parser.JSONParser;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;

JSONParser parser = new JSONParser();
JSONObject obj = (JSONObject)parser.parse(json.trim());
Iterator keys = obj.keys(); <<<<<<<<<<<<<<<<<<<<<<<<<<<< keys() undefined
while(keys.hasNext()) {
    String key = keys.next();
}

json example :

{a:132,b:"1321",test:"something"}

any help appreciated

thanks

You can try this:

JSONObject jsonArray = ...//get json object

Iterator<?> keys = jsonArray.keys();

while( keys.hasNext() ) {
    String key = (String) keys.next();
    System.out.println("Value: " + jsonArray.get(key));
    System.out.println("Key: " + key);
}

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I think keySet().iterator() is, what you need:

    JSONParser parser = new JSONParser();
    JSONObject obj = (JSONObject)parser.parse(json.trim());
    Iterator keys = obj.keySet().iterator();
    while(keys.hasNext()) {
        String key = (String)keys.next();
    }

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