asmhatreandClaude Sonnet 5 4a74153d87 hashmap-concurrenthashmap: companion code for the HashMap vs ConcurrentHashMap interview guide ...

Adds JMH put/get throughput benchmarks (synchronizedMap vs ConcurrentHashMap,
swept at 1/2/4/8 threads), a computeIfAbsent recursion trap demo (CHM tolerates
recursion into a different key but throws IllegalStateException on the same
key; plain HashMap throws ConcurrentModificationException even single-threaded),
and a null-handling demo (CHM rejects null keys/values on put() and null keys
on get() too). 7/7 JUnit tests pass; all output/ transcripts captured from
real runs.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01FhzLY5p6okFva3qsnsRyvM

2026-09-30 09:29:06 +00:00

..

01-computeifabsent-recursion.txt

hashmap-concurrenthashmap: companion code for the HashMap vs ConcurrentHashMap interview guide

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02-null-handling.txt

hashmap-concurrenthashmap: companion code for the HashMap vs ConcurrentHashMap interview guide

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03-put-get-benchmark-t1.txt

hashmap-concurrenthashmap: companion code for the HashMap vs ConcurrentHashMap interview guide

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04-put-get-benchmark-t2.txt

hashmap-concurrenthashmap: companion code for the HashMap vs ConcurrentHashMap interview guide

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05-put-get-benchmark-t4.txt

hashmap-concurrenthashmap: companion code for the HashMap vs ConcurrentHashMap interview guide

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06-put-get-benchmark-t8.txt

hashmap-concurrenthashmap: companion code for the HashMap vs ConcurrentHashMap interview guide

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07-correctness-tests.txt

hashmap-concurrenthashmap: companion code for the HashMap vs ConcurrentHashMap interview guide

2026-09-30 09:29:06 +00:00