Concurrent Modification Exception Error.

[Philip Zac]

hello all,

I am trying to figure out the error in my code. So far i couldnt find out. I have gone through other people's post and reply.

             for (Iterator iter = hotelWizardBean.getPlanList().iterator(); iter.hasNext() :wink:  {
            Plan plan = (Plan) iter.next();     // error pointing here.   
 
            if (plan.getName().equalsIgnoreCase(domesticPlanName)) {
                plan.setDefaultDomestic(true);
                plan.setShowOnDomestic(true);
            } else {
                plan.setDefaultInbound(false);
            }
 
            if (plan.getName().equalsIgnoreCase(inboundPlanName)) {
                plan.setDefaultInbound(true);
                plan.setShowOnInbound(true);
            } else {
                plan.setDefaultInbound(false);
            }
 
           hotelWizardBean.getPlanList().add(plan);   // without this no error. 
 
        }
 
 
        
        

From other post, I do understand that it is impossible to add during iteration. Is there any other way to add a collection?

Just to inform you that hotelWizardBean is a collections of list and objects .

Any help will be grateful.
thanks
Philip

[Ulf Dittmer]

This happens if the underlying collection is modified structurally during the iteration (as the add method does). You can use a ListIterator instead of an Iterator; it has methods that can modify the underlying collection during the iteration (provided the collection allows that).

[Rodrigo Lopes]

You don't need to add the plan again in the list.
It is already in the list.

[Philip Zac]

Thank you Rodrigo Lopes and Ulf for the quickest reply.