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.asn1;

import java.util.Vector;


a general class for building up a vector of DER encodable objects -
this will eventually be superceded by ASN1EncodableVector so you should
use that class in preference.

/**
 * a general class for building up a vector of DER encodable objects -
 * this will eventually be superceded by ASN1EncodableVector so you should
 * use that class in preference.
 */
public class DEREncodableVector
{
    Vector v = new Vector();

    
Deprecated:use ASN1EncodableVector instead.
/**
     * @deprecated use ASN1EncodableVector instead.
     */
    public DEREncodableVector()
    {

    }
    
    public void add(
        DEREncodable   obj)
    {
        v.addElement(obj);
    }

    public DEREncodable get(
        int i)
    {
        return (DEREncodable)v.elementAt(i);
    }

    public int size()
    {
        return v.size();
    }
}