java - Android JSON names order -

i'm using following code parse info site , works expect older in last loop goes out of whack. names() comes out

["569","570","565","566","567","568","562","563","564"]

those number should in numeric order aren't. there way fix this?

import java.io.ioexception; import java.io.inputstream; import java.io.inputstreamreader; import java.io.stringwriter; import java.io.unsupportedencodingexception; import java.net.httpurlconnection; import java.net.url; import java.util.arraylist; import java.util.hashmap; import java.util.iterator; import java.util.linkedlist; import java.util.list; import java.util.map; import java.util.sortedmap; import java.util.treemap;  import org.json.jsonarray; import org.json.jsonexception; import org.json.jsonobject; import org.xmlpull.v1.xmlpullparser; import org.xmlpull.v1.xmlpullparserfactory;  import android.annotation.suppresslint; import android.util.log;  public class json {    private string html;    private string version = "version";    private string pagestring = null;    private string urlstring = "http://frc-manual.usfirst.org/a/getallitems/manualid=3";     public volatile boolean parsingcomplete = true;    public json(string page){       this.pagestring = page;    }    public string gethtml(){       return html;    }    public string getversion(){       return version;    }     @suppresslint("newapi")    public void readandparsejson(string in) {       try {          jsonobject reader = new jsonobject(in);            jsonobject head = reader.getjsonobject("data").getjsonobject("subchapter").getjsonobject("3").getjsonobject("children").getjsonobject(pagestring);          html = head.getstring("item_content_text");           if(head.has("children")){              jsonobject children = head.getjsonobject("children");              jsonarray sub1 = new jsonarray(children.names().tostring());              for(int i=sub1.length()-1;i>=0;i--){                  jsonobject children2 = children.getjsonobject(integer.tostring(sub1.getint(i)));                  html = html + "<h2>" + children2.getstring("secdisp")+ " " + children2.getstring("item_name") + "</h2>";                  html = html + children2.getstring("item_content_text");                  if(children2.has("children")){                      jsonobject children3 = children2.getjsonobject("children");                      jsonarray sub2 = new jsonarray(children3.names().tostring());                      html = html + sub2;                      for(int j=sub2.length()-1;j>=0;j--){                          jsonobject children4 = children3.getjsonobject((string) sub2.get(j));                          html = html + "<h3>" + children4.getstring("secdisp")+ " " + children4.getstring("item_name") + "</h3>";                          html = html + children4.getstring("item_content_text");                      }                  }              }          }           jsonobject main  = reader.getjsonobject("data");          version = main.getstring("latestmanualupdate");           parsingcomplete = false;            } catch (exception e) {            // todo auto-generated catch block            e.printstacktrace();         }     }    public void fetchjson(){       thread thread = new thread(new runnable(){          @override          public void run() {          try {             url url = new url(urlstring);             httpurlconnection conn = (httpurlconnection) url.openconnection();             conn.setreadtimeout(10000 /* milliseconds */);             conn.setconnecttimeout(15000 /* milliseconds */);             conn.setrequestmethod("get");             conn.setdoinput(true);             // starts query             conn.connect();          inputstream stream = conn.getinputstream();        string data = convertstreamtostring(stream);        readandparsejson(data);          stream.close();           } catch (exception e) {             e.printstacktrace();          }          }       });         thread.start();          }    static string convertstreamtostring(java.io.inputstream is) {       java.util.scanner s = new java.util.scanner(is).usedelimiter("\\a");       return s.hasnext() ? s.next() : "";    }  } 

the order of keys in jsonobject undefined (see documentation keys()). in practice, means ordered according hash codes, not want. if need keep these items in specific order, either:

• use different json parser. there plenty available google search; i'd suggest perhaps "push-parser" may appropriate type, guaranteed give items in object 1 after in order defined. json-simple 1 such parser. @ examples 5 & 6 in "decoding examples" page. alternatively, see example 4 how change type of map uses storing json objects in object-model mode, , note linkedhashmap preserves order values added it.
• sort list of names before use them
• change json use array of objects contain number rather object numbers keys, arrays (obviously) kept in order appear in original json.