Method append

src/main/java/com/volmit/adapt/util/JSONObject.java:731–742

Append values to the array under a key. If the key does not exist in the JSONObject, then the key is put in the JSONObject with its value being a JSONArray containing the value parameter. If the key was already associated with a JSONArray, then the value parameter is appended to it. @param key A

(String key, Object value)

     *                       the key is not a JSONArray.
     */
    public JSONObject append(String key, Object value) throws JSONException {
        testValidity(value);
        Object object = this.opt(key);
        if (object == null) {
            this.put(key, new JSONArray().put(value));
        } else if (object instanceof JSONArray) {
            this.put(key, ((JSONArray) object).put(value));
        } else {
            throw new JSONException("JSONObject[" + key + "] is not a JSONArray.");
        }
        return this;
    }

    /**
     * Get the value object associated with a key.