How to Iterate Over a JSON Object Using JSONObject in Java?

Iterating over a JSON Object

In your quest to iterate over a JSON object, your chosen library, JSONObject, may require a different approach than when working with JSON arrays. Unlike arrays, which offer direct indexing using brackets, JSON objects provide keys to access their elements.

To illustrate, consider the following JSON data obtained from Facebook:

{
   "http://http://url.com/": {
      "id": "http://http://url.com//"
   },
   "http://url2.co/": {
      "id": "http://url2.com//",
      "shares": 16
   }
   ,
   "http://url3.com/": {
      "id": "http://url3.com//",
      "shares": 16
   }
}

In this scenario, you can opt for the following approach to access the elements of the object:

JSONObject jsonObject = new JSONObject(contents.trim());
Iterator<String> keys = jsonObject.keys();

while(keys.hasNext()) {
    String key = keys.next();
    if (jsonObject.get(key) instanceof JSONObject) {
          // Perform actions on the JSONObject
    }
}

This code snippet ensures you can traverse keys associated with values that are also JSON objects, enabling you to process their contents as needed.

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