Trying to understand Java RSA key size

Question

The key generator was initilized with a size of 1024, so why the printed sizes are 635 and 162?

import java.security.KeyPair;
import java.security.KeyPairGen         


        

Answer 1

First hint: 1024 bits = 128 bytes

Second hint: privateKey.getEncoded() returns an encoded representation (i.e. not raw).