Java – Converts a string public key to an RSA public key

I’m trying to convert a string public key to a public key with modulus and exponential.
But why doesn’t it work?

Here is my code

     public void toPubKey(String filename,String sms) throws NoSuchAlgorithmException, NoSuchProviderException, InvalidKeySpecException, IOException{
    byte[]keyBytes=sms.getBytes();
    byte[]decode = Base64.encode(keyBytes, Base64.DEFAULT);
    KeyFactory fact = KeyFactory.getInstance("RSA");
    X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(decode);
    PublicKey pubKey2 = (PublicKey)fact.generatePublic(x509KeySpec);
    saveToFile(filename,pubKey2);

Is there a problem with my code?

Maybe you mean your code is:

byte[]decode = Base64.decode(keyBytes, Base64.DEFAULT);

Change encode to decode.