The list of Java objects is sorted by specific objects, not by

I have the following jsonarray trying to sort it So, to convert my jsonarray to ArrayList, then sort them and convert them back to jsonarray

Please find the original jsonarray (not in the sort order)

[  
   {  

      "code":"TE-7000-8003-W","id":"13342",},{  
      "code":"TE-7000-8003","id":"13163",{  
      "code":"TE-7000-8003-WK","id":"11573",{  
      "code":"TE-7000-8003S","id":"11565",{  
      "code":"TE-7000-8003-K","id":"11557",}
]

Please find my code below, which converts my jsonarray to ArrayList and sorts them

Item item=null;
List<Item> newItemList = new ArrayList<Item>();
for (int i=0;i<resultJSONArray.length();i++) {
    JSONObject jobj = resultJSONArray.getJSONObject(i);
    item = new Item();
    item.setId(jobj.optString("id"));
    item.setCode(jobj.optString("code"));
    newItemList.add(item);
}

 newItemList
  .stream()
  .sorted((object1,object2) -> object1.getCode().compareTo(object2.getCode()));

Iterator<Item> itr = newItemList.iterator();
while(itr.hasNext()) {
    Item item1=itr.next();
    System.out.println("Item----->"+item1.getCode());
}

The following is the output, not the sort order

Item----->TE-7000-8003-W
Item----->TE-7000-8003
Item----->TE-7000-8003-WK
Item----->TE-7000-8003S
Item----->TE-7000-8003-K

I look forward to the following results:

Item----->TE-7000-8003
Item----->TE-7000-8003S
Item----->TE-7000-8003-K
Item----->TE-7000-8003-W
Item----->TE-7000-8003-WK

Solution

Do not change the actual list when creating a stream and using sorted So you do cloud

List<Item> sortedItemList =newItemList
.stream()
.sorted((object1,object2) -> object1.getCode().compareTo(object2.getCode()))
.collect(Collectors.toList());

Or better yet, use the sort method to sort the list

newItemList
.sort((object1,object2) -> object1.getCode().compareTo(object2.getCode()));

And you can use comparator Comparing (item:: getcode) to replace the comparator

newItemList
.sort(Comparator.comparing(Item::getCode));