How to find programatically the length of a private key?

Hello,
I generate a keystore and a private key in it with the command:
keytool -genkey -v -alias myPrivKey -keyalg RSA -keysize 4096I then can access the private key with the following code:
KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
InputStream is = new FileInputStream("/path/to/keystore", keyStorePassword);
ks.load(is);
KeyStore.PasswordProtection protParam = new KeyStore.PasswordProtection(privKeyPassword);
KeyStore.PrivateKeyEntry privKeyEntry = (KeyStore.PrivateKeyEntry)ks.getEntry("myPrivKey", protParam);
PrivateKey privKey = privKeyEntry.getPrivateKey();How can I get the length of the private key using the PrivateKey privKey object in my code? In this case I know it is 4096, but how can I find the lengths of arbitrary rsa private keys?
Thank you very much for your answers in advance.
Regards
Rambius

RSAPrivateKey privKey = (RSAPrivateKey)privKeyEntry.getPrivateKey();
BigInteger modulus = privKey.getModulus();
int length = modulus.bitLength(); // See the Javadoc for details

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