About Question enthuware.ocpjp.v8.2.1747 :

[lveto15]

There is a small typo in this question - no al is in the code. There is also an extra ).

To match answers first line in the main method should be changed to:
List<Integer> al = Arrays.asList(100,200,230,291,43);

[admin]

Fixed.
thank you for your feedback!