Creating Map composed of 2 Lists using stream().collect in Java

Question

As for example, there are two lists:

List list1 = Arrays.asList(1.0, 2.0);
List list2 = Arrays.asList(\"one_point_zero\", \"two_p         


        

Answer 1

Instead of using an auxiliary list to hold the indices, you can have them generated by an IntStream.

Map map = IntStream.range(0, list1.size())
            .boxed()
            .collect(Collectors.toMap(i -> list1.get(i), i -> list2.get(i)));