How to convert an ArrayList containing Integers to primitive int array?

Question

I\'m trying to convert an ArrayList containing Integer objects to primitive int[] with the following piece of code, but it is throwing compile time error. Is it possible to

Answer 1

Google Guava

Google Guava provides a neat way to do this by calling Ints.toArray.

List list = ...;
int[] values = Ints.toArray(list);