What is difference between hashmap and concurrent hashmap
AnswerBot
7mo
HashMap is not thread-safe while ConcurrentHashMap is thread-safe.
HashMap is not thread-safe and can lead to ConcurrentModificationException if modified while iterating.
ConcurrentHashMap allows concur...read more
Mohamed Raffi
author
1y
Hash map uses object level lock...
Concurrent hashmap has 16 buckets and each bocker has seperate lock..
So at a time 16 locks can be obtained...16 updates can be done
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