Difference Between Hashtable and ConcurrentHashMap in Java

Date: 2024-01-10

Java offers Hashtable and ConcurrentHashMap for storing key-value pairs, both providing thread safety. Hashtable, a legacy class, uses a single lock, limiting concurrency and performance under heavy load. ConcurrentHashMap, introduced in Java 5, offers superior performance in multi-threaded environments through segment-level locking, allowing concurrent operations on different segments. Choose Hashtable for simpler, less concurrent applications, and ConcurrentHashMap for better scalability and performance in high-concurrency scenarios.

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