Streams: mapToObj turns an IntStream back into a Stream of objects

mapToObj is the primitive-to-reference counterpart of boxed(), applying a function that turns each int into an object, such as a formatted label, in one step.

Code

List<String> labels = IntStream.rangeClosed(1, 5)
        .mapToObj(i -> "item-" + i)
        .toList();
System.out.println("Labels: " + labels);

Output

Labels: [item-1, item-2, item-3, item-4, item-5]