what is wrapper calss .where can we use wrapper class in java.give me one example?
krovi
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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
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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
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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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