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problem : For input string: " "

 
bee fouda
Greenhorn
Posts: 14
Eclipse IDE Postgres Database Tomcat Server
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i have a problem that i didn't understand
and i have no idea how to resolved
please i need your help

here is the problem


my Managed bean


my Dao



my html file

 
Tim Holloway
Saloon Keeper
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Posts: 18025
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Android Eclipse IDE Linux
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I cannot see the total problem - that would be more work than they pay me for - but I did notice 2 things:

1. You should almost always wrap a Collection (List or Array) that is being used as a table model object inside a JSF DataModel object and use that object as the dataTable's value.

2. The "get" method is going to be invoked multiple times (often 5 times or more), so doing a database fetch within the "get" or its sub-routines is not only very expensive in terms of performance, but may actually return inconsistent data in the event that other processes are updating the database at the time.
 
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