Java SecureRandom generate random String

import java.security.SecureRandom;
import java.util.Arrays;
import java.util.List;

public class Main {

   public static void main(String[] args) {

      System.out.println(generatePassword(10));
      System.out.println(generatePassword(20));
   }/*from   ww  w.j  a  v a2s.c  om*/

   public static String generatePassword(int passwordLength) {
      int asciiFirst = 33;
      int asciiLast = 126;
      Integer[] exceptions = { 34, 39, 96 };

      List<Integer> exceptionsList = Arrays.asList(exceptions);
      SecureRandom random = new SecureRandom();
      StringBuilder builder = new StringBuilder();
      for (int i = 0; i < passwordLength; i++) {
         int charIndex;
         do {
            charIndex = random.nextInt(asciiLast - asciiFirst + 1) + asciiFirst;
         } while (exceptionsList.contains(charIndex));

         builder.append((char) charIndex);
      }

      return builder.toString();
   }
}