Converter for old collections: Vector and Hashtable

Reported by Jim Gentilesco

Here's the error message:

Exception in thread "main" java.lang.NullPointerException
at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.createCollection(AbstractCollectionConverter.java:48)
at com.thoughtworks.xstream.converters.collections.CollectionConverter.fromXML(CollectionConverter.java:31)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:121)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:114)
at Bug.main(Bug.java:15)

Here's the code:

import java.util.*;
import com.thoughtworks.xstream.*;

public class Bug
{
public static void main(String[] args)

{ Vector o1 = new Vector(); o1.addElement("bug"); XStream xstream = new XStream(); String xml = xstream.toXML(o1); System.out.println(xml); Vector o2 = (Vector)xstream.fromXML(xml); // String xml2 = xstream.toXML(o2); // System.out.println(xml2); }

}