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.asn1.x509;

import java.util.Vector;

public class GeneralNamesBuilder
{
    private Vector names = new Vector();

    public GeneralNamesBuilder addNames(GeneralNames names)
    {
        GeneralName[] n = names.getNames();

        for (int i = 0; i != n.length; i++)
        {
            this.names.addElement(n[i]);
        }

        return this;
    }

    public GeneralNamesBuilder addName(GeneralName name)
    {
        names.addElement(name);

        return this;
    }

    public GeneralNames build()
    {
        GeneralName[] tmp = new GeneralName[names.size()];

        for (int i = 0; i != tmp.length; i++)
        {
            tmp[i] = (GeneralName)names.elementAt(i);
        }

        return new GeneralNames(tmp);
    }
}