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Java / Collections

The default capacity of Collection Elements: ArrayList, Vector, HashSet, Hashtable, and HashMap.

Collection Java 8 Before Java 8
Initial capacity Load factor Initial capacity Load factor
ArrayList 0 (lazily initialized to 10) 10
Vector 10 10
HashSet 16 0.75 16 0.75
HashMap 16 0.75 16 0.75
Hashtable 16 0.75 11 0.75

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List and its implementations

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