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Doubt in K&B SCJP 5: assert and boxing

Cindy Rogers
Ranch Hand

Joined: May 17, 2006
Posts: 31
p 373 (in section "Assertion Expression Rules"): "The first expression must always result in a boolean value!"

p 375 (in Exam Watch box): "An assert expression must result in a boolean value, true or false?"


I found that boxing applies to asserts; that is, the first expression may be a boolean or a Boolean.
marc weber
Sheriff

Joined: Aug 31, 2004
Posts: 11343

Originally posted by Cindy Rogers:
...I found that boxing applies to asserts; that is, the first expression may be a boolean or a Boolean.

That's correct...


"We're kind of on the level of crossword puzzle writers... And no one ever goes to them and gives them an award." ~Joe Strummer
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Barry Gaunt
Ranch Hand

Joined: Aug 03, 2002
Posts: 7729
To be pedantic, the Boolean wrapper object is unboxed to a boolean primitive value.


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It is sorta covered in the JavaRanch Style Guide.
 
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