Java in a Nutshell, 5th Edition [Electronic resources] نسخه متنی

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.

Figure 14-76. java.security.interfaces.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 ( );  
}