Interpretation of HashMap HashTable HashSet source code
A HashMap HashTable HashSet
HashMap is a hash table that stores key value mappings. It inherits from AbstractMap and implements Map, Cloneable and Serializable interfaces. The implementation of HashMap is not synchronous, which means that it is not thread safe. Its key and value can be null. The mappings in HashMap are not ordered.
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Added by fred_belanger on Sat, 15 Jan 2022 20:50:55 +0200
hashCode() and equals() require redefinition
What is the function of hashCode method?
(1) Foreword, to understand the function of hashCode, you must first know the collection in Java.
There are two types of collections in Java,
One is List, and the other is Set. The elements in the former set are ordered and can be repeated; The latter element is unordered, but the element is not re ...
Added by MattMan on Tue, 21 Dec 2021 10:44:31 +0200