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Exception in thread "main" java.lang.NullPointerException

 
Greenhorn
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Hello, i am a beginner, trying to figure out the error "Exception in thread "main" java.lang.NullPointerException
at dao.TestDao.main(TestDao.java:25)"

Attached Here is the file TestDao.java

 
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Where the file ?
 
Marshal
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Welcome to the Ranch, arrah leke!

Please post the code here instead. And also please post it inside the code tags. (Read our FAQ article UseCodeTags for help with that.)
 
arrah leke
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Thanks very much. here is the code
 
John Joe
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Perhaps the prod size is empty ?
 
Paul Clapham
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This turned out to be line 25 in the code you posted here, is it also line 25 in your text editor?

If so then it's the "prod" variable which must be null. And that implies that in line 24, dao.produitParMC("%a%") returned null. Is that something which you could expect from that method? If so, you should check for null and only proceed with using the result if it isn't null.
 
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And if it isn't that line then the only other one that can cause a NullPointerException would be p.toString(), but that would still point to the dao.produitParcMC method being the problem.
 
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