number out of string in java

Question

I have something like \"ali123hgj\". i want to have 123 in integer. how can i make it in java?

Answer 1

int index = -1;
for (int i = 0; i < str.length(); i++) {
   if (Character.isDigit(str.charAt(i)) {
      index = i; // found a digit
      break;
   }
}
if (index >= 0) {
   int value = String.parseInt(str.substring(index)); // parseInt ignores anything after the number
} else {
   // doesn't contain int...
}