public class SharpStack
{
    private SharpStackItem lastSharp;
    public SharpStackItem currentSharp;
    private boolean hasSharps;
    private SharpStackItem newItem;
    
    public SharpStack()
    {
        lastSharp = null;
        currentSharp = null;
        
        hasSharps = false;
    }
    
    public void addItem(Sharp sharp)
    {
        if(hasSharps == false) 
        {
            newItem = new SharpStackItem(sharp);
        }
        
        else 
        {
            newItem = new SharpStackItem(sharp, lastSharp.getSharp());
        }
        
        sharp.setStackItem(newItem);
        
        lastSharp = newItem;
        currentSharp = newItem;
        
        hasSharps = true;
    }
    
    public boolean hasMore()
    {
        if(!hasSharps) return false;
        if(currentSharp.isFirst()) return false;
        else return true;
    }
    
    public boolean hasAny()
    {
        return hasSharps;
    }
    
    public Sharp getCurrent()
    {        
        return currentSharp.getSharp();
    }
    
    public void nextItem()
    {
        currentSharp = currentSharp.getPrevious();   
    }
}
<br />
<b>Notice</b>:  (null)(): [ALERT] Mailbox is over quota in <b>Unknown</b> on line <b>0</b><br />