JSON Parsing to ArrayList

Question

I am looking for approach.

I am parsing in JSON which is returning data in form

UserA  PhotoURL1  
UserA  PhotoURL2
UserB  PhotoURL3
UserA  PhotoURL4
UserB  PhotoURL5
UserA  PhotoURL6

I need to store it in My Custom Array List

String name,
List<Photo> photos

So result should be

UserA   Photo1 
        Photo2
        Photo4
        Photo6

UserB   Photo3
        Photo5

What approach should I take? Please help

What does your JSON look like exactly? What JSON library do you use, if any? — fge
– fge, Commented Dec 22, 2012 at 12:50
apart from the two comments above, you show us that you are not expecting an ArrayList, but a Map.. — Kent
– Kent, Commented Dec 22, 2012 at 12:52
Hi , Parsing of JSON is not an issue for me. To store data in correct data structure is the issue. Kent , Do you think i need a map to store and dispaly data in this form — vineet
– vineet, Commented Dec 22, 2012 at 13:10

Ricardo Marimon · Accepted Answer · 2012-12-22 12:57:51Z

2

Populating a map (as @Kent suggests) from the given data is usually done using something like this:

Map<String, List<Photo>> result = new HashMap<String, List<Photo>>();

while(data.hasMoreData()) {

  String name = data.getName();
  String photo = data.getPhoto();

  List<Photo> photos = result.get(name);
  if (photos == null) {
    photos = new ArrayList<Photo>();
    result.put(name, photos);
  }
  photos.add(photo);

}

System.out.println(result);

In any event we would need to understand how the original data is json formatted to do this.

answered Dec 22, 2012 at 12:57

Ricardo Marimon

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2 Comments

vineet Over a year ago

Thanks , I am trying your answer.

vineet Over a year ago

You saved my day. You are genious. Hats off to you.

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