/** * Determine if the value is null. * @param index The index must be between 0 and length() - 1. * @return true if the value at the index is null, or if there is no value. */ public boolean isNull(int index) { return JSONObject.NULL.equals(opt(index)); }
Object obj = a.opt(i); this.value(obj);
/** * Get the optional string associated with an index. * The defaultValue is returned if the key is not found. * * @param index The index must be between 0 and length() - 1. * @param defaultValue The default value. * @return A String value. */ public String optString(int index, String defaultValue) { Object o = opt(index); return o != null ? o.toString() : defaultValue; }
/** * Get the object value associated with an index. * @param index * The index must be between 0 and length() - 1. * @return An object value. * @throws JSONException If there is no value for the index. */ public Object get(int index) throws JSONException { Object o = opt(index); if (o == null) { throw new JSONException("JSONArray[" + index + "] not found."); } return o; }
sb.append(','); Object o = ja.opt(i); if (o != null) { String s = o.toString();
for (i = 0; i < len; ++i) { b.append(toString( ja.opt(i), (tagName == null) ? "array" : tagName));
/** * Produce a JSONObject by combining a JSONArray of names with the values * of this JSONArray. * @param names A JSONArray containing a list of key strings. These will be * paired with the values. * @return A JSONObject, or null if there are no names or if this JSONArray * has no values. * @throws JSONException If any of the names are null. */ public JSONObject toJSONObject(JSONArray names) throws JSONException { if (names == null || names.length() == 0 || length() == 0) { return null; } JSONObject jo = new JSONObject(); for (int i = 0; i < names.length(); i += 1) { jo.put(names.getString(i), this.opt(i)); } return jo; }