Java In A Nutshell, 5th Edition

This interface represents a DSA private key and provides direct access to the underlying key value. If you are working with a private key you know is a DSA key, you can cast the PrivateKey to a DSAPrivateKey .

public interface DSAPrivateKey extends DSAKeyjava.security.PrivateKey { // Public Constants 1.2 public static final long serialVersionUID ; =7776497482533790279 // Public Instance Methods java.math.BigInteger getX ( ); }