org.json.JSONException: JSONArray[0] not a string

Question

Hi i am trying to parse json My json looks like:

"data":[[0,1,0],[0,2,0],[0,3,0],[0,4,0],[0,5,0]]

i am using following code to perform action

int k=0;
for (int j = 1; j <= 7; j++)
                {
                    String data = json.getJSONArray("data").getString(k);
                    data = data.substring(1, data.length() - 1);
                    String[] countArr = data.split(",");
}

Following Excetion i am geting;

org.json.JSONException: JSONArray[0] not a string.
    at org.json.JSONArray.getString(JSONArray.java:333)
    at com.inrev.analytics.manager.impl.IRticsManagerImpl.userActivity(IRFbAnalyticsManagerImpl.java:4276)
    at com.inrev.analytics.action.facebook.IRFsightsAction.pageUserActivity(IRFBInsightsAction.java:4004)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:870)
    at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1293)
    at ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68)

json.getJSONArray("data") return a JSONArray, not a String — Hacketo
– Hacketo, Commented Mar 16, 2016 at 13:15
i think json above is not valid, a { at begin and } and end is missing — Yazan
– Yazan, Commented Mar 16, 2016 at 13:16
Not really sure at the moment, but I guess that there is some kind of "getList()" function. Consider carefully reading the error message first before posting it here...It says "not a string", you are calling "getString()". Kinda visible what the problem is here. — René Jahn
– René Jahn, Commented Mar 16, 2016 at 13:17
its a array inside an array. so be careful to fetch the data — Vikrant Kashyap
– Vikrant Kashyap, Commented Mar 16, 2016 at 13:28
you had initialised with numbers then how can you expect string from initialised data?? — SmashCode
– SmashCode, Commented Mar 16, 2016 at 13:43

ThomasThiebaud · Accepted Answer · 2016-03-16 13:16:59Z

1

The error is quite clear. The first element is not a String but a JSONArray

Do something like this

JSONArray data = json.getJSONArray("data");

for (int i=0; i<data.length(); i++) {
    JSONArray element = data.getJSONArray(i);
    //Do something with your element
}

answered Mar 16, 2016 at 13:16

ThomasThiebaud

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