package eu.eudat.logic.utilities.helpers; public class MyStringUtils { public static int getFirstDifference(String s1, String s2) { char[] s1ar = s1.toCharArray(); char[] s2ar = s2.toCharArray(); for(int i = 0; i < s1ar.length; i++) { if (s2ar.length > i) { if (s1ar[i] != s2ar[i]) { return i; } } else { return i; } } return -1; } }