title: Increment digit value in String
body: <p>So, i have some String with digits and another symbols, and i want to increment the value of each digit at 1. For example:   "test1check2" from this String i want to recieve "test2check3". And can i make this only with method "replaceAll"? (i.replaceAll("\d", ...) something like that)?, without to use methods such like indexOf, charAt... </p>