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See this thread and this one for details.
The moose likes Programmer Certification (SCJP/OCPJP) and the fly likes Wrapper Classes Big Moose Saloon
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Win a copy of The Java EE 7 Tutorial Volume 1 or Volume 2 this week in the Java EE forum
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JavaRanch » Java Forums » Certification » Programmer Certification (SCJP/OCPJP)
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Author

Wrapper Classes

Kosh Shah
Greenhorn

Joined: Jul 20, 2004
Posts: 19
Are all Wrapper Class objects immutable?
marc weber
Sheriff

Joined: Aug 31, 2004
Posts: 11343

Yes.


"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
sscce.org
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: Wrapper Classes