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My binding with datatable give me null ate the backing bean, do i miss some thing

 
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Hi , what i'm trying to do is first to load arraylist of student objects in h:datatable in the jsp, than on submit i want to get those student collection back in backing bean.
The datatable will have student information in columns containing h:inputtext. So user can edit the collection of student .

For this i did binding with HTMLDatatable in backing bean. but this gives me null pointer exception. why?

This is as follows

my backing bean



this is my jsp




i get null pointer exception in method doItRe() of backing bean why ?, did i missed out something
 
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There are pointers here that could solve your problem --

http://balusc.blogspot.com/2006/06/using-datatables.html
 
Don't get me started about those stupid light bulbs.
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