Turns out I'm stuck on Java 1.4.2_16, but this feature was only added to Java in 1.5 :'(
Compile time failure:
(I've trimmed out quite a lot of the script to be succinct)
Important bits:
use Inline Java => <<'END_OF_JAVA'
--snip--
Map<String,Long> myMap = new Map<String,Long>();
--snip--
Then when I check it:
perl -c test.pl
--snip--
The error message was:
test_pl_185a.java:31: <identifier> expected
Map<String,Long> myMap = new Map<String,Long>();
^
1 error
--snip--
The program runs perfectly with just that Map removed (I'm adding a new feature)
What am I doing wrong?