connected2 anon nick & password generator

CreateAnonNickPass.java

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
public class CreateAnonNickPass {

 public static void main(String[] args) {
  String anonPass = (new BigInteger(200, new SecureRandom())).toString(32);
  String anonNick = getAnonNickFromPassword(anonPass);
  System.out.println("Anon ID : " + anonNick);
  System.out.println("Anon Pass : " + anonPass);
 }

 public static String computeHash(String paramString) throws NoSuchAlgorithmException, UnsupportedEncodingException {
  MessageDigest messageDigest = MessageDigest.getInstance("SHA-256");
  messageDigest.reset();
  byte[] arrayOfByte = messageDigest.digest(paramString.getBytes("UTF-8"));
  StringBuffer stringBuffer = new StringBuffer();
  int j = arrayOfByte.length;
  for (int i = 0; i < j; i++) {
   stringBuffer.append(Integer.toString((arrayOfByte[i] & 0xFF) + 256, 16).substring(1));
  }
  return stringBuffer.toString();
 }

 public static String getAnonNickFromPassword(String paramString) {
  try {
   paramString = computeHash(paramString).substring(0, 15);
   StringBuilder stringBuilder = new StringBuilder();
   stringBuilder.append("anon-");
   stringBuilder.append(paramString);
   return stringBuilder.toString();
  } catch (Exception exception) {
   return null;
  }
 }
}