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What do u mean by wrapper Class?
What do u mean by Jvm... How do u change JVM for other OS?
Or No need to Change ...? its like tricky
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Answer Posted / rajesh
"Wrapper class" has two meanings.
A class with a similar name to a primitive type, which
encapsulates the value of that primitive, and provides
methods which relate to that sort of primitive.
A class which calls methods of something else, and adds an
additional layer of functionality.
The first sort includes Integer, Double, etc, and there are
(I think) also classes like Void. Also an interface called
NullType.
In the 2nd sort you could have a List and surround it with
a class which calls all the List methods, but makes sure
that all the calls become thread-safe. Look in the
Collections class for methods like synchronizedList.
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