java - How do you implement recursion for comments? -

i'm trying parse reddit comments, , stuck on how of comment replies in 1 call.

a reddit comment object begins array ["data"]["children"]. loop through that, , ["children"]["replies"]["data"]["children"] array gives of sub-comment replies. can grab more comments (if available) ["replies"]["data"]["children"] array.
right now, have hard-coded retrieves 3 levels deep. how make dynamic keeps on retrieving until there no more comments?

here code have far not dynamic:

    jsonobject data = commentsobj.get("data").asobject();       jsonarray children = data.get("children").asarray();       final treenode root = treenode.root();       (int i=0; < children.size(); i++)     {         jsonobject obj = children.get(i).asobject();          jsonobject dataobj = obj.get("data").asobject();                      string author = fetchwithhandling(dataobj, "author");          string body = fetchwithhandling(dataobj, "body");           string likes = fetchwithhandling(dataobj, "likes");          int score = fetchintwithhandling(dataobj, "score");          string createdutc = fetchwithhandling(dataobj, "created_utc");          jsonobject repliesobj = fetchobjwithhandling(dataobj, "replies");           if (author != null && body != null)         {                redditcommentholder.reddititem reddititem = new redditcommentholder.reddititem(author, body, createdutc, integer.tostring(score), likes, null);               treenode commentroot = new treenode(reddititem);               if (repliesobj != null)             {                 jsonobject datarepliesobj = fetchobjwithhandling(repliesobj, "data");                  jsonarray morecomments = fetcharraywithhandling(datarepliesobj, "children");                   (int a=0; < morecomments.size(); a++)                 {                     jsonobject = morecomments.get(a).asobject();                     jsonobject datacomments = it.get("data").asobject();                       string newauthor = fetchwithhandling(datacomments, "author");                      string newbody = fetchwithhandling(datacomments, "body");                      string newlikes = fetchwithhandling(datacomments, "likes");                      string newcreatedutc = fetchwithhandling(datacomments, "created_utc");                     int newscore = fetchintwithhandling(datacomments, "score");                      jsonobject thirdcommentsdata = fetchobjwithhandling(datacomments, "replies");                       if (newauthor != null && newbody != null)                     {                         redditcommentholder.reddititem newreddititem = new redditcommentholder.reddititem(newauthor, newbody, newcreatedutc, integer.tostring(newscore), newlikes, null);                           treenode subcommentroot = new treenode(newreddititem);                           if (thirdcommentsdata != null)                         {                             jsonobject thirddata = fetchobjwithhandling(thirdcommentsdata, "data");                             jsonarray thirdchildren = fetcharraywithhandling(thirddata, "children");                               (int p=0; p < thirdchildren.size(); p++)                             {                                 jsonobject thirdit = thirdchildren.get(p).asobject();                                  jsonobject thirdcomments = thirdit.get("data").asobject();                                   string thirdauthor = fetchwithhandling(thirdcomments, "author");                                 string thirdbody = fetchwithhandling(thirdcomments, "body");                                  string thirdlikes = fetchwithhandling(thirdcomments, "likes");                                  int thirdscore = fetchintwithhandling(thirdcomments, "score");                                 string thirdcreatedutc = fetchwithhandling(thirdcomments, "created_utc");                                  if (thirdauthor != null && thirdbody != null)                                 {                                     redditcommentholder.reddititem thirdreddititem = new redditcommentholder.reddititem(thirdauthor, thirdbody, thirdcreatedutc, integer.tostring(thirdscore), thirdlikes, "continue_thread");                                       treenode thirdroot = new treenode(thirdreddititem);                                     subcommentroot.addchildren(thirdroot);                                 }                             }                         }                          commentroot.addchildren(subcommentroot);                      }                 }             }         }     } 

this android project, , treenode variable view setting up. thanks

well, you've answered question in title - recursion :)

i'm not going give actual code, since reddit (and android) specific , don't use reddit (and android), looks regular recursive dfs ok.

java pseudocode:

treeelementclass root = getelementrecursive(data)  treeelementclass getelementrecursive(jsonobject obj){     treeelementclass parent = new treeelementclass();     ...some initialization of parent element...     for(jsonobject child : obj.get("children").asarray()){         parent.addchild(getelementrecursive(child))     }     return parent; }