Performance impact of autoboxing

Question

Usually the compiler generates code to perform boxing and unboxing. But what does the compiler, if the boxed values are not needed? Is the (Oracle standard) compiler smart e

Answer 1

Will the compiler actually insert code for boxing each value of the array?

The compiler will reject the code because an int[] cannot be passed into a method that takes an Object[] parameter.

Autoboxing happens only for individual primitive values, never for entire arrays.