getting okta key with nimbus

OktaGetpublickeyNimbus.java

/**
Okta provides the kid field in the header part of the JWT token.
**/
PublicKey loadKey(String keyId) {
    try {

        JSONObject key = getProviderRSAJWK(
                retrieveOIDCProviderMetadata().getJWKSetURI().toURL().openStream(),
                keyId);

        return RSAKey.parse(key).toRSAPublicKey();


    } catch (Exception e) {
        throw new RuntimeException("Unable to retrieve public key with id "+ keyId, e);
    }
}