Criptografia java (como usar este codigo) [Resolvido]

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import sun.misc.BASE64Encoder;

/**
 *
 * @author Windows
 */
public class EncriptaSenha {
    public static String encripta (String senha) {
        try {
            MessageDigest digest = MessageDigest.getInstance("MD5");
            digest.update(senha.getBytes());
            BASE64Encoder encoder = new BASE64Encoder ();
            return encoder.encode (digest.digest ());
        } catch (NoSuchAlgorithmException ns) {
            ns.printStackTrace ();
            return senha;
        }
    }
}