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JDK1.8

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Mike Chen's Internet Architecture
Mike Chen's Internet Architecture
Dec 19, 2022 · Backend Development

Understanding the Implementation of Java ConcurrentHashMap (Differences Between JDK 1.7 and JDK 1.8)

This article explains the internal design of Java's ConcurrentHashMap, covering hash table fundamentals, contrasts with HashMap and Hashtable, and details the architectural changes from the segment‑based locking in JDK 1.7 to the node‑based, CAS‑driven structure with tree bins in JDK 1.8.

ConcurrencyConcurrentHashMapJDK1.7
0 likes · 10 min read
Understanding the Implementation of Java ConcurrentHashMap (Differences Between JDK 1.7 and JDK 1.8)
Java Captain
Java Captain
Apr 19, 2020 · Fundamentals

Why HashMap Is Not Thread‑Safe: Analysis of JDK 1.7 and JDK 1.8 Behaviors

This article explains why Java's HashMap is inherently thread‑unsafe, detailing how JDK 1.7’s resize operation can create circular linked lists and data loss, while JDK 1.8’s insertion logic can cause overwrites, and provides code examples and step‑by‑step analysis.

ConcurrencyData StructureHashMap
0 likes · 10 min read
Why HashMap Is Not Thread‑Safe: Analysis of JDK 1.7 and JDK 1.8 Behaviors
Mike Chen's Internet Architecture
Mike Chen's Internet Architecture
Nov 14, 2018 · Fundamentals

Implementation Principles of ConcurrentHashMap (CurrentHashMap) in JDK 1.7 and JDK 1.8

This article explains the underlying principles of hash tables, compares HashMap, Hashtable and ConcurrentHashMap, and details the architectural differences of ConcurrentHashMap in JDK 1.7 (segment‑based locking) versus JDK 1.8 (array‑list‑tree with CAS), including code examples and performance trade‑offs.

ConcurrencyConcurrentHashMapHashMap
0 likes · 8 min read
Implementation Principles of ConcurrentHashMap (CurrentHashMap) in JDK 1.7 and JDK 1.8