Parse different types of data from input java

Question

Different lists of data will be entered on command line.

"J,A,V,A"
"4,H,11,V,3,H"

I need to store the first list in a char array. I also want to have the next line in a char array of "H,V,H" and an int array of "4,11,3". What is the best way to go about doing this? I'm hesitant to split on the comma because I don't know if the input is going to be separated by just a comma or a comma and a space. I'm having difficulty since when I use a scanner everything stays in a string, and when I try to split it the string becomes a string array.

I'm having difficulty since when I use a scanner everything stays in a string, and when I try to split it the string becomes a string array.

Answer 1

The following seems to work for me.. Only ran it in the debugger, but it workd on the two lines of input you provided.

import java.lang.System;
import java.util.ArrayList;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
    ArrayList<Integer> ints = new ArrayList<Integer>();
    ArrayList<Character> chars = new ArrayList<Character>();

    Scanner console = new Scanner(System.in);

    while (console.hasNext()) {
        String line = console.next();
        String[] tokens = line.split("\\s*,\\s*");

        for (int i = 0; i < tokens.length; i++) {
        if (isInteger(tokens[i])) {
            ints.add(Integer.parseInt(tokens[i]));
        } else if (isChar(tokens[i])) {
            chars.add((char) tokens[i].indexOf(0));
        }
        }

    }
    console.close();

    }

    private static boolean isInteger(String s) {
        try {
            Integer.parseInt(s);
        } catch (NumberFormatException e) {
            return false;
        }
        // only got here if we didn't return false
        return true;
    }

private static boolean isChar(String s) {
if (s.length() != 1) {
    return false;
}
return true;
}

}