How to join 2 lists in Java-8 such that element at same indexes from the 2 list come together in the resultant list

Question

I have 2 lists codeList and nameList both having String elements.

    codeList = ["1", "2", "3"];
    nameList = ["One", "Two", "Three"];

I want to combine these in such a way that the elements on same index come together in resultant String separated with |:

"1{One} | 2{Two} | 3{Three}"

Is there any way of directly getting the resultant list or String from the 2 list itself using Java 8

I am able to achieve this by using a Map but not list.

What is this `[ "1{One}" | "2{Two}" | "3{Three}" ]` list or String, if list this is not possible! — YCF_L, Jul 01 '20 at 11:03
Then what do you want? You're telling every person a different thing... — Andronicus, Jul 01 '20 at 11:07
@Andronicus: I was trying with to get a List but after reading the replies, I think String was a better option, list can be made out of the String with | being used to split it — Akash Sharma, Jul 01 '20 at 11:09

Andronicus · Accepted Answer · 2020-07-01T11:22:27.843

4

You can use IntStream with indices of those lists:

IntStream.range(0, codeList.size())
    .mapToObj(i -> codeList.get(i) + "{" + nameList.get(i) + "}")
    .collect(Collectors.joining("|"));

edited Jul 01 '20 at 11:22

answered Jul 01 '20 at 11:11

Andronicus

1 Answers1