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

public static void main(String[] args) {
    String str = "1,2,5-9,11,12,19-21";
    String[] val = str.split(",");
    List l = new ArrayList();
    for (String s : val) {

        if (s.contains("-")) {
            String[] strVal = s.split("-");
            int startVal = Integer.parseInt(strVal[0]);
            int endVal = Integer.parseInt(strVal[1]);
            for (int i = startVal; i <= endVal; i++) {
                l.add(i);
            }
        } else {
            l.add(Integer.parseInt(s));
        }
    }
    for (int j : l) {
        System.out.println(j);
    }
}

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