ConcurrentHashMap Internals #1860
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Q: How does it achieve thread safety without full locking? |
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Answered by
shivrajcodez
Mar 21, 2026
Replies: 1 comment
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CAS (Compare-And-Swap) → atomic updates (no locks) |
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CAS (Compare-And-Swap) → atomic updates (no locks)
Volatile → visibility guarantees (no caching issues)
Atomic classes (AtomicInteger, etc.)
Immutable objects → no modification = safe
Concurrent collections (ConcurrentHashMap)
Lock-free / wait-free algorithms
Read-Write separation (more reads, fewer locks)