java.Util.List serializable

I have an interface defined like this
public interface SRequest extends javax.ejb.EJBObject {

    public List ListLookup(String Id)
            throws ApplicationException, java.rmi.RemoteException;
}

I get this when I compile(just as Info)
Kind      Status      Priority      Description      Resource      In Folder      Location
Info                  CHKJ2500I: java.util.List must be serializable at runtime (EJB 2.0: 7.10.5).

how do I make this serializable?       
Can I use some other collection to  achieve this? This List returns more than 1000 elements in the list ..will it cause Stack Overflows?
skn73Asked:
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nagwani1Commented:
use java.util.ArrayList instead

as long as you have enough memory in the heap, list can grow

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suprapto45Commented:
Hi,

>>"will it cause Stack Overflows"
It should not.

Regard
Dave
skn73Author Commented:
Thanks!
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