Java WEB: Md5

package br.com.rosanelliweb.classes;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class Md5 {

public static String geraMd5(String senha) {
JFrame component = new JFrame();
MessageDigest md = null;
try {
md = MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException ex) {
JOptionPane.showMessageDialog(component, ex.getMessage());
}
BigInteger hash = new BigInteger(1, md.digest(senha.getBytes()));
senha = hash.toString(16);
return senha;
}
}