Java - How to read integers separated by a space into an array

Question

I am having trouble with my project because I can't get the beginning correct, which is to read a line of integers separated by a space from the user and place the values into an array.

    System.out.println("Enter the elements separated by spaces: ");
    String input = sc.next();
    StringTokenizer strToken = new StringTokenizer(input);
    int count = strToken.countTokens();
    //Reads in the numbers to the array
    System.out.println("Count: " + count);
    int[] arr = new int[count];

    for(int x = 0;x < count;x++){
        arr[x] = Integer.parseInt((String)strToken.nextElement());
    }

This is what I have, and it only seems to read the first element in the array because when count is initialized, it is set to 1 for some reason.

Can anyone help me? Would it be better to do this a different way?

Answer 1

There is only a tiny change necessary to make your code work. The error is in this line:

String input = sc.next();

As pointed out in my comment under the question, it only reads the next token of input. See the documentation.

If you replace it with

String input = sc.nextLine();

it will do what you want it to do, because nextLine() consumes the whole line of input.

Answer 2

String integers = "54 65 74";
List<Integer> list = new ArrayList<Integer>();
for (String s : integers.split("\\s"))  
{  
   list.add(Integer.parseInt(s));  
}
list.toArray();