In this SCJP topic ,you will learn about Wrapper Class.
In this SCJP topic ,you will learn about Wrapper Class.In this section you will learn about Wrapper classes and all the methods that
manipulate data and allows to operate a certain work.
Wrapper class is a wrapper around a primitive data type. It represents primitive
data types in their corresponding class instances e.g. a boolean data type can
be represented as a Boolean class instance. All of the primitive wrapper classes
in Java are immutable i.e. once assigned a value to a wrapper class instance
cannot be changed further.
For more details click on the following link.