How do I copy a stack in Java?

Question

I have a stack A and I want to create a stack B that is identical to stack A. I don\'t want stack B to simply be a pointer to A -- I actually want to create a new stack B th

Answer 1

 /**
     * Copy constructor for the Stack class
     * @param original the Stack to copy
     * @postcondition a new Stack object which is
     * an identical, but distinct, copy of original
     */
    public Stack(Stack original) {
        if (original.length == 0)
        {
            length = 0;
            top = null;
        } else
        {
            Node temp = original.top;
            while (temp != null)
            {
                push(temp.data); // inserts into this
                temp = temp.next;
            }
            temp = top;
            temp = temp.next;
            top.next = null;
            while (temp != null){
                push(temp.data); // inserts into this
                temp = temp.next;
            }

        }
    }