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;
        }

    }
}