HashMap

HashMap Key of key understand

HashMap Save key value pairs (key-value), adopt key Can be uniquely obtained value. Whether the key values are the same is determined by two functi...
2021-08-24 23:44 views 9

ConcurrentHashMap How to ensure thread safety

JDK1.7, Segment lock technology is essentially array + The form of linked list stores key value pairs . To improve concurrency , The original whole...
2021-04-09 13:42 views 51

Java of HashMap Multiple ways to traverse , Dynamic deletion

ergodic HashMapMap<Integer, String> map = new HashMap<>();map.put(1, "aaa");map.put(2, "bbb");map.put(3, "ccc");map.put(4, "ddd"); Com...
2021-01-23 21:41 views 36

Tiktok Java Three aspects of post technology sharing ：Java Basics + network HashMap+JVM+ database

one side （40 minute ） The comparative basis of one side question project Java Object What are the methods of a class , Separate action HashMap...
2020-10-13 16:00 views 19

HashMap realization LRU（ Least recently used ） Cache update algorithm

Recently Alibaba telephone interview was asked how to use fixed capacity HashMap, realization LRU algorithm . At that time, he was confused , Usua...
2019-05-30 07:54 views 64

ergodic HashMap Four methods of

stay Map In the set values(): Method is to get all the values in the collection ---- There is no key , There is no correspondence ,KeySet(): take ...
2019-04-26 15:27 views 43
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