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

Magic you are looking at

public static List magicallyGetListFromString(String s){
   String[] str=s.split(",");
   List result=new ArrayList();
   for(String i:str){
       if(i.contains("-")){
           String[] ss=i.split("-");
           int lower= Integer.parseInt(ss[0]);
           int upper= Integer.parseInt(ss[1]);
           for(int j=lower;j<=upper;j++){
               result.add(j);
           }
       }else {
           result.add(Integer.parseInt(i));
       }
   }
    return result;
}

Result:

[1, 2, 5, 6, 7, 8, 9, 11, 12]