string to char to string to int

Question

Basically, what this code does is getting a number in any length from the user and sends it back to the user in a digit per digit form plus the sum of all the digits on the given number(eg 1234= 1, 2, 3, 4. sum=10). However, I can't make it work on a negative number.

    Scanner s= new Scanner(System.in);

    String num= s.nextLine();

    char arr[]= new char[num.length()];
    int numsarray[]= new int[num.length()];
    String number[]= new String[num.length()];
    int sum=0;

    for(int i=0; i<num.length();i++)
    {
        arr[i]=num.charAt(i);
        System.out.println(arr[i]);

        number[i]=Character.toString(arr[i]);

        numsarray[i]=Integer.parseInt(number[i]);
    }

    for(int i=0;i<num.length();i++)
    {   
        sum+=numsarray[i];
    }
    System.out.println("Sum:"+sum);

Answer 1

Any reason you do not check first whether the number is less then 0 or not? You could then use abs to make it positive and run it through your function. Takes away the hassle to deal with the hyphen at arr[0]. Of course you should have some bool to store the sign :-)