JSON array get length

Question

I can\'t get the array length of the JSON array. when I using length(); method it is not working, it show as red underline in Netbeans

this is the source code

Answer 1

The below snippet works fine for me(I used the size())

String itemId;
            for (int i = 0; i < itemList.size(); i++) {
            JSONObject itemObj = (JSONObject)itemList.get(i);
            itemId=(String) itemObj.get("ItemId");
            System.out.println(itemId);
            }

If it is wrong to use use size() kindly advise

Answer 2

The JSONArray.length() returns the number of elements in the JSONObject contained in the Array. Not the size of the array itself.

Answer 3

I came here and looking how to get the number of elements inside a JSONArray. From your question i used length() like that:

JSONArray jar = myjson.getJSONArray("_types");
System.out.println(jar.length());

and it worked as expected. On the other hand jar.size();(as proposed in the other answer) is not working for me.

So for future users searching (like me) how to get the size of a JSONArray, length() works just fine.

Answer 4

have you tried size() ? Something like :

jar.size();

Hope it helps.

Answer 5

Note: if you're using(importing) org.json.simple.JSONArray, you have to use JSONArray.size() to get the data you want. But use JSONArray.length() if you're using org.json.JSONArray.

Answer 6

At my Version the function to get the lenght or size was Count()

You're Welcome, hope it help someone.