What is Auto Boxing and Auto Unboxing ?

Answer 1

Autoboxing is the automatic conversion that the Javacompiler makes between the primitive types and their corresponding object wrapper classes. For example, converting an int to an Integer, a double to a Double, and so on. If the conversion goes the other way, this is called unboxing.

Answer 2

autoboxing is the conversion of primitive datatype to wrapper class object. auto-unboxing is the conversion of wrapper class object to primitive datatype.

Answer 3

FYI: there ain't anything like auto-unboxing it's unboxing because you have to unbox explicitly