JasperReports: Converting String into array and populating List with it - list

Question

What I have is this String [125, 154, 749, 215, 785, 1556, 3214, 7985]
(string can have anything from 1 to 15 ID's in it and the reason it is a string and not a List is that, its being sent through a URL)
I need to populate a List called campusAndFaculty with it
I am using iReport 5.0.0
I've tried entering this in the campusAndFaculty default value Expression field
Array.asList(($P{campusAndFacultyString}.substring( 1, ($P{campusAndFacultyString}.length() -2 ))).split("\\s*,\\s*"))
But it does not populate the campusAndFaculty List
Any idea how I can populate the List campusAndFaculty using that String ("campusAndFacultyString")?
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UPDATE
I have these variables in iReport (5.0.0)
String campusAndFacultyFromBack = "[111, 125, 126, 4587, 1235, 1259]"
String noBrackets = $P{campusAndFacultyFromBack}.substring(1 ($P{campusAndFacultyFromBack}.length() -1 ))
List campusAndFacultyVar = java.util.Arrays.asList(($V{noBrackets}).split("\\s*,\\s*"))
When I print campusAndFacultyVar It returns "[111, 125, 126, 4587, 1235, 1259]"
but when I use it in a Filter I get the "Cannot evaluate the following expression: org_organisation.org_be_id in null"

Answer 1

This works for me:
String something = "[125, 154, 749, 215, 785, 1556, 3214, 7985]";
Arrays.asList((something.substring(1, (something.length() -1 ))).split("\\s*,\\s*"));
Which means you can do this in iReport:
java.util.Arrays.asList(($P{campusAndFacultyString}.substring(1, (something.length() -1 ))).split("\\s*,\\s*"));
Differences with your snippet:
It's Arrays, not Array
You should take 1, not 2 from the length
Fully qualified reference to Arrays class (which may or may not matter depending on how your iReport is configured)