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.math.ec;

public class ScaleYPointMap implements ECPointMap
{
    protected final ECFieldElement scale;

    public ScaleYPointMap(ECFieldElement scale)
    {
        this.scale = scale;
    }

    public ECPoint map(ECPoint p)
    {
        return p.scaleY(scale);
    }
}