arrays - How to convert int[] into List in Java? - Stack Overflow

Also from guava libraries... com.google.common.primitives.Ints:

List<Integer> Ints.asList(int...)

The easiest way to do this is to make use of Apache Commons Lang. It has a handy ArrayUtils class that can do what you want. Use the toPrimitive method with the overload for an array of Integers.

List<Integer> myList;
 ... assign and fill the list
int[] intArray = ArrayUtils.toPrimitive(myList.toArray(new Integer[myList.size()]));

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