import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.SecureRandom;
import java.security.spec.DSAPrivateKeySpec;
public class MainClass {
public static void main(String args[]) throws Exception {
KeyPairGenerator kpg = KeyPairGenerator.getInstance("DSA");
kpg.initialize(512, new SecureRandom());
KeyPair kp = kpg.generateKeyPair();
Class spec = Class.forName("java.security.spec.DSAPrivateKeySpec");
KeyFactory kf = KeyFactory.getInstance("DSA");
DSAPrivateKeySpec ks = (DSAPrivateKeySpec) kf.getKeySpec(kp.getPrivate(), spec);
FileOutputStream fos = new FileOutputStream("exportedKey");
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeObject(ks.getX());
oos.writeObject(ks.getP());
oos.writeObject(ks.getQ());
oos.writeObject(ks.getG());
}
}