JSONArray.names() reorders the objects?

Question

I have the following json returned to me from an API.

"sections": {
  "1": {
    "title":"Within 1 Km",
    "count":6
  },
  "3": {
    "title":"Within 3 Km",
    "count":1
  },
  ....and some more here

It's worth nothing this is not a JSON Array.

I need to iterate through the objects contained with sections, but because it is not a JSON array, I'm extracting the names ("1", "3", and so on) and looping through the JSON selecting each object.

JSONObject jsSecs = new JSONObject(data).getJSONObject("sections");
JSONArray jsSecsArray = jsSecs.names();

What I've noticed is that JSONArray.names() will return an array of names out of order from the JSON.

I expected 0th element to contain "1", 1st element to contain "3".

What I got was 0th element to contain "10", 2nd element to contain "1", etc - all out of sync.

What's going on here? Have I missed something obvious? I don't want to reorder things if I don't have to. It seems like more fuss than it's worth.

Just a side note: Use jakson json, and your problem is solved in one liner. — user517491
– user517491, Commented Mar 30, 2012 at 12:05

jeet · Accepted Answer · 2012-03-30 11:58:54Z

4

check http://www.json.org/javadoc/org/json/JSONObject.html, it clearly explains:

A JSONObject is an unordered collection of name/value pairs.

Means A JSONObject does not maintain order of insertion. as lists or JSONArray has.

answered Mar 30, 2012 at 11:58

jeet

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1 Comment

Andrew Weir Over a year ago

Well that explains it. Thanks.

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