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  1. public class Main {
  2.     public static void main(String[] args) {
  3.         String s = "h10jv2sf";
  4.  
  5.         char lastLetter = 0;
  6.         boolean isDigit = false;
  7.         int digit = 0;
  8.         for(char c : s.toCharArray()) {
  9.             if(Character.isDigit(c)) {
  10.                 isDigit = true;
  11.                 digit = digit*10 + (c-'0');
  12.                 continue;
  13.             }
  14.             if(isDigit) {
  15.                 for(int i = 0; i < digit-1; i++) {
  16.                     System.out.print(lastLetter);
  17.                 }
  18.                 isDigit = false;
  19.                 digit = 0;
  20.             }
  21.             System.out.print(lastLetter);
  22.             lastLetter = c;
  23.         }
  24.         System.out.print(lastLetter);
  25.     }
  26. }
Success #stdin #stdout 0.1s 320576KB
comments (?)
stdin 
Standard input is empty
stdout 
hhhhhhhhhhjvvsf
https://ideone.com/PpEtC5
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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