http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.crypto.params;

import java.math.BigInteger;

public class DSAPrivateKeyParameters
    extends DSAKeyParameters
{
    private BigInteger      x;

    public DSAPrivateKeyParameters(
        BigInteger      x,
        DSAParameters   params)
    {
        super(true, params);

        this.x = x;
    }   

    public BigInteger getX()
    {
        return x;
    }
}