java, data decryption

There is a string encryption/decryption class.

Encryption function:

public static String DESEncrypt(String datasource, String password) {
    String result = datasource;
    if (datasource != null) {
        try {
            if (!datasource.isEmpty()) {
                SecretKey securekey = SecretKeyFactory.getInstance("DES").generateSecret(new DESKeySpec(password.substring(0, 8).getBytes(Hex.DEFAULT_CHARSET_NAME)));
                AlgorithmParameterSpec iv = new IvParameterSpec(ivkey);
                Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
                cipher.init(1, securekey, iv);
                result = Base64.encodeToString(cipher.doFinal(datasource.getBytes(Hex.DEFAULT_CHARSET_NAME)), 0);
            }
        } catch (Throwable e) {
            Log.i("@error", e.getMessage());
        }
    }
    return result;
}

Decryption function:

public static String DESDecrypt(String src, String password) {
    String result = src;
    if (src == null) {
        return result;
    }

    if (src.isEmpty()) {
        return result;
    }

    byte[] item = password.substring(0, 8).getBytes();
    try {
        DESKeySpec item2 = new DESKeySpec(item);
        SecretKey securekey = SecretKeyFactory.getInstance("DES").generateSecret(item2);
    } catch (InvalidKeyException e) {
        // TODO Auto-generated catch block
        //e.printStackTrace();
    }

    return password.substring(0, 8);
    /*AlgorithmParameterSpec iv = new IvParameterSpec(ivkey);
      Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
      cipher.init(2, securekey, iv);
      return new String(cipher.doFinal(Base64.getDecoder().decode(src)));*/        
}

I am interested in the decryption function, when I run it, I see an error on the line

SecretKey securekey = SecretKeyFactory.getInstance("DES").generateSecret(item2);

Gentlemen experts, tell me, what am I doing wrong?

I am an expert in php,mysql.