How to read an array of integers from a text file, where each number is written in a new line?

  • Give at least the file format. Numbers can be separated by a space, line by line .. Is there any more like a binary file with an array of ints? - vp_arth
  • @vp_arth, are you a programmer? And in JS and Java ... where will I meet you ?) - Yuri
  • @Yuri, yes anywhere) We can all) - vp_arth
  • @vp_arth, you are an interesting person. I would talk to you. Check out my chat ( chat.stackexchange.com/rooms/52027/communication-with-the-yuri ) like something :) - Yuri
  • one
    Describe the solution to the problem in more detail so that you can give a normal answer. - Yuri

1 answer 1

You can use Scanner for this:

try (Scanner scanner = new Scanner(new File("in.txt"))) { ArrayList<Integer> numbers = new ArrayList<>(); while (scanner.hasNextInt()) { numbers.add(scanner.nextInt()); } System.out.println(numbers); } catch (FileNotFoundException e) { e.printStackTrace(); }

If necessary, you can create an array based on the resulting list:

 Integer[] array = numbers.toArray(new Integer[0]);