LinkedHashMap: Introduction

Explore the features and constructors of Java's LinkedHashMap to understand how it maintains insertion order and access order in a map. Learn how to create instances with different settings and how element access affects order, helping you manage key-value storage effectively.

We'll cover the following...

Creating a LinkedHashMap

Using a no-arg constructor
Using the constructor that takes initial capacity
Using the constructor that takes initial capacity and load factor
Using the constructor that takes access order flag
Using the constructor that takes another Map

Inserting into a LinkedHashMap

A HashMap does not maintain insertion order and TreeMap stores the elements in sorted order. Now, if we want to store the elements in a Map in insertion order, then a LinkedHashMap can be used. LinkedHashMap is a class in the java.utils package that implements the Map interface and extends the HashMap class. It is similar to HashMap with the additional feature of maintaining the order of elements inserted into it.

Some of the important features of a LinkedHashMap are:

It does not allow duplicate

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1.Let's Begin

2.Lists in Java

3.LinkedList in Java

4.CopyOnWriteArrayList in Java

5.Sets in Java

6.TreeSet in Java

7.HashMap In Java

8.TreeMap in Java

9.LinkedHashMap in Java

10.Additional Map Implementations

11.Arrays Class

12.Collections Class

LinkedHashMap: Introduction