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  1. class Ideone {
  2.  
  3.  
  4.    public static void main (String args[]) {
  5.       String str = "h3jv3s11";
  6.       String res = "";
  7.       int l = 0;
  8.       int r = 0;
  9.       while (l < str.length()) {
  10.          if(Character.isDigit(str.charAt(l))) {
  11.             r = l;
  12.             while (r < str.length() && Character.isDigit(str.charAt(r))) r++;
  13.             res += fill(str.charAt(l - 1), Integer.parseInt(str.substring(l, r)) - 1);
  14.             l = r;
  15.          } else {
  16.             res += str.charAt(l);
  17.             l++;
  18.          }
  19.       }
  20.       System.out.println(res);
  21.    }
  22.  
  23.    public static String fill(char c, int l) {
  24.       String res = "";
  25.       for(int i = 0; i < l; i++) {
  26.          res += c;
  27.       }
  28.       return res;
  29.    }
  30. }
Success #stdin #stdout 0.09s 320512KB
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Standard input is empty
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hhhjvvvsssssssssss
https://ideone.com/OXB5WA
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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