Check If Jsonobject Key Exists

I'm making api calls to a back-end who always has a JSONArray series and sometimes has a JSONArray places. In the code below, I am trying to write an if statement that says, whenev

Solution 1:

Check if the object has a key called places.

if (passingObject.has("places") {
    JSONArray places = passingObject.getJSONArray("places");
} else {
    askServerAgain();
}

Solution 2:

Or you can use http://www.json.org/javadoc/org/json/JSONObject.html#optJSONArray(java.lang.String)

JSONArray places = passingObject.optJSONArray("places");
if(places == null){...}

optJSONArray(); It returns null if there is no such key, or if its value is not a JSONArray.