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package com.javapatterns.iterator.copsandsales;
public class BackwardIterator implements Iterator
{
public BackwardIterator(ShoppingCart aCart)
{
cart = aCart;
}
public void first()
{
state = cart.count() - 1;
}
public void next()
{
if (!isDone())
{
state--;
}
}
public boolean isDone()
{
if (state<0)
{
return true;
}
return false;
}
public Object currentItem()
{
return cart.currentItem(state);
}
private int state;
private ShoppingCart cart;
}
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