What is (Stack) in "(Stack)super.clone()"?

hi. There's this code from the java tutorial (in the topic "Being a Descendent of Object"):
protected Object clone() {
        try {
            Stack s = (Stack)super.clone();     // clone the stack   ---->look here
            s.items = (Vector)items.clone();     // clone the vector   -----> look here
            return s;                    // return the clone
        } catch (CloneNotSupportedException e) {
            // this shouldn't happen because Stack is Cloneable
            throw new InternalError();
}I'd like to know what "(Stack)" and "(Vector)" stand for.

they are casts.
http://java.sun.com/developer/onlineTraining/new2java/supplements/2002/mar02.html#1

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Warning! This procedure will destroy all data on your Hard Disk Drive. Be sure you have an up-to-date, tested backup of at least your Users folder and any third party applications you do not want to re-install before attempting this procedure.
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Message was edited by: Michael McLennan

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