10 recommended articles about LinkedHashMap

This article mainly introduces the relevant knowledge of LinkedHashMap in Java, which has a good reference value. Let's take a look at it with the editor. First introduction to LinkedHashMap. In most cases, as long as there are no thread safety issues involved, Map can basically use HashMap. However, there is a problem with HashMap, that is, the order in which HashMap is iterated is not the order in which HashMap is placed. It's just disorder. This shortcoming of HashMap often causes trouble, because in some scenarios, we expect an ordered Map. At this time, LinkedHashMap makes its debut. Although it increases time and space overhead, LinkedHashMap guarantees the order of element iteration by maintaining a doubly linked list that runs on all entries. Answers to the four points of concern on LinkedHashMap Concern points Regarding whether LinkedHashMap allows empty Key and Value, whether LinkedHashMap allows empty Key and Value. Whether LinkedHashMap allows duplicate data Key

1. Detailed explanation of how LinkedHashMap ensures element iteration The order

Introduction: This article mainly introduces the relevant knowledge of LinkedHashMap in Java and has a good reference value. Let’s take a look with the editor below

2. Detailed explanation of Java collection framework LinkedHashSet and LinkedHashMap source code analysis (picture)

Introduction: General introduction If you have read the previous explanations about HashSet and HashMap, as well as TreeSet and TreeMap, you must be able to think of the LinkedHashSet and LinkedHashMap that will be explained in this article. Actually it's the same thing. LinkedHashSet and LinkedHashMap also have the same implementation in Java. The former just wraps the latter, which means that there is a LinkedHashMap (adapter mode) in LinkedHashSet. Therefore, this article will focus on analyzing LinkedHashM..

3. LRU cache and implementation principles of Java and Android

Introduction: 1. Overview Android provides the LRUCache class, which can be conveniently used to implement caching of the LRU algorithm. Java provides LinkedHashMap, which can be used to easily implement the LRU algorithm. Java's LRULinkedHashMap directly inherits LinkedHashMap, and the LRU algorithm can be implemented with very few changes. 2. Java's LRU algorithm The basis of Java's LRU algorithm is LinkedHashMap, Lin

4. Implementation method of JavaMap sorted by Value

Introduction: Map is a collection interface of key-value pairs. Its implementation classes mainly include: HashMap, TreeMap, Hashtable and LinkedHashMap, etc. This article mainly introduces the implementation method of Java Map sorting by Value. Friends who need it can refer to

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