Checking if two strings are permutations of each other

Question

How to determine if two strings are permutations of each other

Answer 1

Best Way to do this is by sorting the two strings first and then compare them. It's not the most efficient way but it's clean and is bound to the runtime of the sorting routine been used.

boolean arePermutation(String s1, String s2) { 
  if(s1.lenght() != s2.lenght()) {
     return false;
   }
   return mySort(s1).equals(mySort(s2));
 }

  String mySort(String s) {
   Char letters[] = s.toCharArray();
   Arrays.sort(letters);
   return new String(letters);
}