get the optional double value associated with an index . nan is returned if there is no value for the index , or if the value is not a number and can not be converted to a number . concode_field_sep PlaceHolder placeHolder concode_field_sep JSONObject optJSONObject concode_elem_sep double getDouble concode_elem_sep String getString concode_elem_sep JSONArray optJSONArray concode_elem_sep JSONArray getJSONArray concode_elem_sep long getLong concode_elem_sep int getInt concode_elem_sep boolean optBoolean concode_elem_sep boolean optBoolean concode_elem_sep Object opt concode_elem_sep int optInt concode_elem_sep int optInt concode_elem_sep long optLong concode_elem_sep long optLong concode_elem_sep Object get concode_elem_sep String optString concode_elem_sep String optString concode_elem_sep boolean getBoolean concode_elem_sep String toString concode_elem_sep String join concode_elem_sep JSONObject getJSONObject
double function ( int arg0 ) { return this . optDouble ( arg0 , Double . NaN ) ; }