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From: Duncan Mak <duncanmak@gmail.com>
Date: Fri, 3 Jul 2020 17:46:19 -0400
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Subject: Working with string keys in a java.util.Map
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Hello all,

I've been playing around with the java.nio APIs.

Using Files:readAttributes, you can get a Map<String, Object> of attributes.

#|kawa:80|# attrs
{owner=duncan, lastAccessTime=2020-07-03T00:12:53.682826Z,
lastModifiedTime=2019-04-22T18:53:02.529968Z, gid=20,
creationTime=2019-04-22T18:53:02Z, isRegularFile=true, nlink=1,
fileKey=(dev=1000007,ino=12896309012), ino=12896309012, mode=33261,
uid=501, size=20799, dev=16777223, isSymbolicLink=false,
permissions=[GROUP_READ, OWNER_READ, OTHERS_READ, OTHERS_EXECUTE,
OWNER_WRITE, GROUP_EXECUTE, OWNER_EXECUTE], rdev=0,
ctime=2019-04-22T18:53:02.533688Z, isOther=false, isDirectory=false,
group=staff}

#|kawa:81|# (attrs:containsKey "owner")
#f
#|kawa:82|# (attrs:get "owner")
#!null
#|kawa:83|# (attrs:get "gid")
#!null

I think this is failing because the literal string that I typed in is a
gnu.lists.IString (https://www.gnu.org/software/kawa/Strings.html) and I
don't see a function to force any one of Kawa's many string representations
into a java.lang.String.

-- 
Duncan.