java - Remove elements with same date from JSONArray -


so, have sort jsonarray contains jsonobject.

strucuture of json following:

[   {     "id": 582,     "istransaction": false,     "todate": "2015-08-26 16:12:00.0",     "fromdate": "2015-08-24 15:11:00.0",     "status": "request_accepted_by_both_sides"   },   {     "id": 602,     "istransaction": false,     "todate": "2015-08-21 21:52:00.0",     "fromdate": "2015-08-20 23:53:00.0",     "status": "request_accepted_by_both_sides"   }, {     "carfk": 1,     "endmileage": 1455,     "ownername": "celien",     "model": "335i",     "status": "driver_set_odometer",     "ownerid": 1,     "todate": "2015-08-26 16:12:00.0",     "startmileage": 455,     "id": 421,     "fromdate": "2015-08-24 15:11:00.0",     "istransaction": true,     "brand": "bmw",     "drivername": "damien",     "exchange": false   } ] 

what have delete jsonobjects have same fromdate field. if 2 object have same field, keep 1 wich contains field istransaction:true

here algortithm wrote :

 private void addonlyrequestortransactionintolistview(jsonarray array) {         jsonarray copyarray = array;         jsonarray resultarray = new jsonarray();          int = 0, j = 0;         try {             while(i < array.length()){                 jsonobject temp = array.getjsonobject(i);                 j = 0;                 while(j < copyarray.length()){                     if(temp.getstring("fromdate").equals(array.getjsonobject(j).getstring("fromdate")))                         if(temp.getboolean("istransaction"))                             resultarray.put(temp);                                                  j++;                 }                 i++;             }         } catch (jsonexception e) {             e.printstacktrace();         } } 

but not want performed.
can give me clues? thanks!

you're comparing every element every element, including itself. should skip case i == j

so instead of:

if(temp.getstring("fromdate").equals(array.getjsonobject(j).getstring("fromdate"))) 

use:

if(i != j && temp.getstring("fromdate").equals(array.getjsonobject(j).getstring("fromdate"))) 

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