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public String md5(String s)
{
    try
    {
        // Create MD5 Hash
        MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
        digest.update(s.getBytes());
        byte messageDigest[] = digest.digest();
        // Create Hex String
        StringBuffer hexString = new StringBuffer();
        for(int i=0; i<messageDigest.length; i++)
        {
            hexString.append(Integer.toHexString(0xFF & messageDigest[i]));
        }
        return hexString.toString();
    }
    catch (NoSuchAlgorithmException e)
    {
        e.printStackTrace();
    }
    return "";
}