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What means wrapper?

I can't understand what wrapper means? I made casting from String to int but, now I'm confused with wrapper, what does it means?

1 Answer

Hello Giorgi Kiknadze,

A wrapper is just a class that can add extra functionality to a primitive type.

The primitive types in java are

byte, short, int, long, float, double, boolean, and char.

It is easy to tell if a type is primitive because it starts with a lower case letter.

The Wrappers for these primitives are as follows

Byte, Short, Integer, Long, Float, Double, Boolean, Character

Wrapper classes can be used to store the same value as of a primitive type variable but the instances/objects of wrapper classes themselves are Non-Primitive.

Hope this helps!

Thanks, it's a great answer.