What Format is this List in?

Question

I'm receiving data in the format:

"result": {"FirstData": {"One": 1, "Two": 2,...

First of all, what is this called usually in Java (2D array)?

Secondly, how do I loop over this to extract the strings?

I understand that if I only had "FirstData" in my array I can do:

public void onSuccess( String[] result)
{   
    for( String Name : result ) {
        System.out.println(Name);   
    }

Going through the same logic for 2D arrays, it doesn't seem to print things out:

public void onSuccess( JSONObject result)
{   //Parse here

    }

EDIT:

Yes it's JSON and it looks like the code has gson (google JSON) installed

EDIT 2:

ABOVE CODE NOW CORRECTED

Yes it is, but then how do I extract those values if that's the data coming back? — fiz, Mar 19 '14 at 14:13
It's not my code that I'm editing, it's a program I have to add a mod to. So I have this part: `service_.Values(myarray , new AsyncCallback() {` I tried changing it to `` but that stopped me from getting a response — fiz, Mar 19 '14 at 14:15
He's asking for the java object that he can deserialize that data into. Please stop telling him it's JSON! — Jason Nichols, Mar 19 '14 at 14:16

score 2 · Answer 1 · answered Mar 19 '14 at 14:13

2

JSON. Use a JSON parser to read the data. One popular parser for Java : google-gson

answered Mar 19 '14 at 14:13

Sajal Dutta

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A link to Jackson or Gson would probably be more helpful than a link to the JSON spec. – chrylis -cautiouslyoptimistic- Mar 19 '14 at 14:17
@chrylis If you scrolled down to the link I provided, you would have seen google-gson there. Anyways, I added google-gson if that matters. – Sajal Dutta Mar 19 '14 at 14:20
So I have the google library gson installed, do you have a quick example of what this would look like to parse the above data? – fiz Mar 19 '14 at 14:23

score 1 · Answer 2 · edited Mar 19 '14 at 14:17

1

You can try using Google Gson, https://code.google.com/p/google-gson/. It can take JSON strings and convert them to Java objects.

edited Mar 19 '14 at 14:17

chrylis -cautiouslyoptimistic-

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answered Mar 19 '14 at 14:15

Vijay

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Joakim M · Accepted Answer · 2014-03-20T09:52:44.150

1

It looks kind of like JSON. JSON-strings is built like this:

Key: Values

However, Values can be new "key:values" so you can have:

"Key": ["InnerKey1":"Value1","Innerkey2","Value2"], "Key2": ["InnerKey1":"Value1","Innerkey2","Value2"] etc.

For you source:

  JSONObject myJSONObject = new JSONObject("Your resultstring goes here");
JSONObject resultObject = myJSONObject.getJSONObject("result");
JSONObject FirstDataObject = resultObject.getJSONObject("FirstData"); //Object with JSONObjects "One","Two" etc


//Since the part " {"One": 1, "Two": 2,..." in your string isn't an JSONArray you cannot do the following but if it were like this "["One": 1, "Two": 2,..." your could do this:

JSONArray FirstDataArray = resultObject.getJSONObject("FirstData"); //Array with JSONObjects "One","Two" etc

JSONArray arr = resultObject.getJSONArray("FirstData"); 
for (int i = 0; i < arr.length(); i++)
{
    String number = arr.getJSONObject(i).getString(0);
    ......
}

edited Mar 20 '14 at 09:52

answered Mar 19 '14 at 14:18

Joakim M

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how would you use this in this situation though? – fiz Mar 19 '14 at 17:21
1

See my edited answer (haven't tested the code for typos and so on) – Joakim M Mar 20 '14 at 09:55
Thankyou for trying, I'll have a go with this now =) – fiz Mar 20 '14 at 10:05
For reference, I was following this: http://www.gwtproject.org/doc/latest/DevGuideServerCommunication.html#DevGuideMakingACall – fiz Mar 20 '14 at 10:06
It was almost what you said but at least you got me closest to being on track, above code now amended – fiz Mar 20 '14 at 10:38
some of those methods you gave me aren't part of JSONObject such as getJSONObject – fiz Mar 20 '14 at 11:23

score 0 · Answer 4 · answered Mar 19 '14 at 14:14

0

Use a JSON parser for Java and you can probably convert it into objects. You can find a variety of Java-based JSON parsers on http://www.json.org/

answered Mar 19 '14 at 14:14

D.R.

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score 0 · Answer 5 · answered Mar 19 '14 at 14:14

0

This string is in the JSON format and hence it is recommended to use a JSON parser.

Read about JSON format in http://www.json.org/.

This link provides explains about JSON in java http://www.json.org/java/

answered Mar 19 '14 at 14:14

anirudh

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What Format is this List in?

5 Answers5