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. 
package org.bouncycastle.jce.spec;

import java.math.BigInteger;


This class specifies an ElGamal public key with its associated parameters.

See Also:
  • ElGamalPrivateKeySpec
/**
 * This class specifies an ElGamal public key with its associated parameters.
 *
 * @see ElGamalPrivateKeySpec
 */
public class ElGamalPublicKeySpec
    extends ElGamalKeySpec
{
    private BigInteger  y;

    public ElGamalPublicKeySpec(
        BigInteger              y,
        ElGamalParameterSpec    spec)
    {
        super(spec);

        this.y = y;
    }

    
Returns the public value y.

Returns:the public value y
/**
     * Returns the public value <code>y</code>.
     *
     * @return the public value <code>y</code>
     */
    public BigInteger getY()
    {
        return y;
    }
}