Answer / rakesh kumar mishra

Collection accepts only object not primitive data-type And
server also works on only Objects.
So By help of wrapper class we can convert primitive
data-type to Object.

Answer / vino

wrappper class uses for primitive datatype act as object.
ex:int-Integer

Answer / qamrun nisa

Wrapper classes are used to wrap primitive types (eg: int,
double, etc) in Objects which can be placed into Vectors,
and many, many other uses.

Following table lists the primitive types and the
corresponding wrapper classes:

Primitive Wrapper

Boolean java.lang.Boolean
Byte java.lang.Byte
Char java.lang.Character
double java.lang.Double
Float java.lang.Float
Int java.lang.Integer
Long java.lang.Long
Short java.lang.Short
Void java.lang.Void

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