Message Digest com JAVA

Acostumado com a função md5 do php que gera uma String como resultado após um digest, acabei apanhando um pouco no Java.

Baseado no post "Java md5 example with MessageDigest", adaptei uma classe para gerar md5 de uma forma um pouco parecida com a do PHP.

Abaixo segue o código fonte da classe:

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * SimpleMessageDigest
 * 
 * this class has static methods to ease the way to use message digest functions
 * @author adolfo
 */
public final class SimpleMessageDigest {

 /**
  * md5 algorithm message digest method
  * @param text
  * @return
  */
 public static final String md5 (String text) {
  
  // starts digesting the received text
  StringBuffer hexString = new StringBuffer();
  
  try {
   MessageDigest md = MessageDigest.getInstance("MD5");
   md.reset();
   md.update(text.getBytes());
   byte[] messageDigest = md.digest();
   
   for (int i = 0; i < messageDigest.length; i++) {
    hexString.append(Integer.toHexString(0xFF & messageDigest[i]));
   }
  } catch (NoSuchAlgorithmException e) {
   // I know that java implements md5 algorithm
  }

  return hexString.toString();
  
 }

 /**
  * sha1 algorithm message digest method
  * @param text
  * @return
  */
 public static final String sha1 (String text)  {
  
  // starts digesting the received text
  StringBuffer hexString = new StringBuffer();
  
  try {
   MessageDigest md = MessageDigest.getInstance("SHA1");
   md.reset();
   md.update(text.getBytes());
   byte[] messageDigest = md.digest();
   
   for (int i = 0; i < messageDigest.length; i++) {
    hexString.append(Integer.toHexString(0xFF & messageDigest[i]));
   }
  } catch (NoSuchAlgorithmException e) {
   // I know that java implements sha1 algorithm
  }
  
  return hexString.toString();
 }
 
}