Java: How to split a string by a number of characters?

Question

I tried to search online to solve this question but I didn\'t found anything.

I wrote the following abstract code to explain what I\'m asking:

String         


        

Answer 1

Here's a succinct implementation using Java8 streams:

String text = "how are you?";
final AtomicInteger counter = new AtomicInteger(0);
Collection strings = text.chars()
                                    .mapToObj(i -> String.valueOf((char)i) )
                                    .collect(Collectors.groupingBy(it -> counter.getAndIncrement() / 4
                                                                ,Collectors.joining()))
                                    .values();

Output:

[how , are , you?]