Splitting String to list of Integers with comma and “-”

Question

Is there a simple way to parse the following String to List of Integers:

String s = \"1,2,5-9,11,12\"

// expected values list: [1,2,5,6,7,8,9,11,12]
List

        

Answer 1

This should work:

public class StringMagic
{
    public static void main(String[] args)
    {
        String s = "1,2,5-9,11,12";

        // expected values list: [1,2,5,6,7,8,9,11,12]
        List values = magicallyGetListFromString(s);
        for (Integer integer : values)
        {
            System.out.println(integer);
        }
    }

    public static List magicallyGetListFromString(String s)
    {
        List numberList = new ArrayList(); 
        String[] numbers = s.split(",");
        for (String string : numbers)
        {
            if (!string.contains("-"))
            {
                numberList.add(Integer.parseInt(string));
            }
            else
            {
                String[] limits = string.split("-");
                int bottomLimit = Integer.parseInt(limits[0]);
                int upperLimit = Integer.parseInt(limits[1]);
                for(int i = bottomLimit; i <= upperLimit; i++)
                {
                    numberList.add(i);
                }
            }
        }
        return numberList;
    }
}