what is wrapper calss .where can we use wrapper class in java.give me one example?
krovi 0 Newbie Poster
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Jump to Posta Wrapper class is a class that 'Wraps' a primitive datatype in a (sort-of) equivalent Object type.
for instance:
primitive int -> Wrapperclass Integer.each primitive type has a Wrapper class that allows the user to treat variables of primitive types (or at least, their Wrapped versions) as objects.
where …
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stultuske 1,116 Posting Maven Featured Poster
a Wrapper class is a class that 'Wraps' a primitive datatype in a (sort-of) equivalent Object type.
for instance:
primitive int -> Wrapperclass Integer.
each primitive type has a Wrapper class that allows the user to treat variables of primitive types (or at least, their Wrapped versions) as objects.
where you can use it? everywhere, I guess. but if you want to compare using equals, or you want to store the a value of a primitive variable in a list (since they only allow objects).
when looking into Wrapper classes and what they are, I recommend you to also have a look at autoboxing/unboxing.
JamesCherrill 4,733 Most Valuable Poster Team Colleague Featured Poster
The Java classes like Integer, Boolean etc are good examples or wrapper classes, but they are not the only ones. This discussion says it all...
http://stackoverflow.com/questions/889160/what-is-a-wrapper-class
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