
It focuses on the Map<K, V> interface, which does not extend Collection, and has key implementations like HashMap (unordered by hash table), TreeMap (ordered by natural/comparable keys), and LinkedHashMap (order of insertion), as well as specialized interfaces like SortedMap and NavigableMap for ordered functionality, allowing efficient storage of key-value pairs.
jdc18
December 18, 2025
January 26, 2026
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