How to prevent HashSet to change my array order that i assign from List?

Question

What i trying to achieve is my Set having the same order as my List which is chaging when i assign value from List to Set. Here is what i do :

// in here my array still showing same as my submited front end
List<ShipmentAddressGroupingDtDto> submitedShipmentAddressGroupingDtDto = shipmentAddressGroupingDto.getShipmentAddressGroupingDtDto();

//in here my array start changing, it's not the same order again as my object above
        Set<ShipmentAddressGroupingDtDto> setShipmentAddressGroupingDtDto = new HashSet(submitedShipmentAddressGroupingDtDto);
        List<ShipmentAddressGroupingDtDto> shipmentAddressGroupingDtDto = new ArrayList<ShipmentAddressGroupingDtDto>(setShipmentAddressGroupingDtDto);

here is my value for submitedShipmentAddressGroupingDtDto :

      [
        "id": 0,
        "address": "Jl. Imam Bonjol",
        "isActive": true,
        "partnerShipmentId": 1
      ],
      [
        "id": 0,
        "address": "Jl. Imam Bonjol",
        "isActive": true,
        "partnerShipmentId": 2
      ],
      [
        "id": 0,
        "address": "Jl. Imam Bonjol",
        "isActive": true,
        "partnerShipmentId": 4
      ],
      [
        "id": 0,
        "address": "Jl. Imam Bonjolx",
        "isActive": true,
        "partnerShipmentId": 7
      ]

and what i saw in debug mode, in my setShipmentAddressGroupingDtDto is like this :

      [
        "id": 0,
        "address": "Jl. Imam Bonjol",
        "isActive": true,
        "partnerShipmentId": 2
      ],
      [
        "id": 0,
        "address": "Jl. Imam Bonjolx",
        "isActive": true,
        "partnerShipmentId": 7
      ],
      [
        "id": 0,
        "address": "Jl. Imam Bonjol",
        "isActive": true,
        "partnerShipmentId": 1
      ],
      [
        "id": 0,
        "address": "Jl. Imam Bonjol",
        "isActive": true,
        "partnerShipmentId": 4
      ]

How do i prevent Set ordering my List? or if i can't prevent that, how can i sort it as my submited value?

Does this answer your question? [Java Ordered Map](https://stackoverflow.com/questions/663374/java-ordered-map) (the tiny bit about `LinkedHashMap` at the end of the selected answer, at least) — Federico klez Culloca, Aug 24 '20 at 09:00
@FedericoklezCulloca yes yes, exactly it worked! i just try it, it didn't change my order anymore, you want to put your comment as the answer? — Ke Vin, Aug 24 '20 at 09:16
Great to hear that :) But since it's a duplicate there's no need to add an answer. — Federico klez Culloca, Aug 24 '20 at 09:17
ohh okay i will delete my question in a sec, thank u brother — Ke Vin, Aug 24 '20 at 09:29

score 1 · Accepted Answer · answered Aug 24 '20 at 09:07

1

You can use a LinkedHashSet which maintains the ordering of the elements you put into it.

answered Aug 24 '20 at 09:07

Viktor Seifert

636
1
7
17

oh sorry i going to accept your answer even it's a duplicate, the question bit different, hope someone find a same mistake can come here, thank you – Ke Vin Aug 24 '20 at 09:41

How to prevent HashSet to change my array order that i assign from List?

1 Answers1