code: public static void shuffle(char[] charArray) {
  		int swapPlace = -1;
  
  		for(int i = 0; i < charArray.length; i++) {
  			swapPlace = (int) (Math.random() * (charArray.length - 1 ));
  			XORSwap.swap(charArray, i, swapPlace);
  		}
  	}
docs: Randomly shuffle a char array
  
  @param charArray array of char to shuffle.