This week's book giveaway is in the Android forum.
We're giving away four copies of Head First Android and have Dawn & David Griffiths on-line!
See this thread for details.
The moose likes Programmer Certification (SCJP/OCPJP) and the fly likes unboxing issues Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of Head First Android this week in the Android forum!
JavaRanch » Java Forums » Certification » Programmer Certification (SCJP/OCPJP)
Bookmark "unboxing issues" Watch "unboxing issues" New topic
Author

unboxing issues

Adeyemi Adeseye
Greenhorn

Joined: Jan 10, 2009
Posts: 27
can someone explain why this code gives a null pointer exception at runtime




SCJP 6.0 (83%)
Kamil Wojcik
Ranch Hand

Joined: May 19, 2008
Posts: 78

because default value for Integer (it's an Object!) is NULL


SCJP 6.0 Passed | SCWCD Passed | PSM in progress...
Adeyemi Adeseye
Greenhorn

Joined: Jan 10, 2009
Posts: 27
oh, tanks, that skipped my mind.
 
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
 
subject: unboxing issues
 
jQuery in Action, 3rd edition