LinkedHashMap vs HashMap
The LinkedHashMap is quite similar to HashMap, with an additional feature of maintaining the order of the inserted element. HashMap provides an easy way to insert, delete, and search the elements, but it does not provide any way to maintain and track the order of the inserted elements. Here, LinkedHashmap came into the picture, which overcomes this issue.
HashMap is a powerful data structure in Java used to store the key-pair values. It maps a value by its associated key. It allows us to store the null values and null keys. It is a non-synchronized class of Java collection. Whereas the LinkedHashMap is an alternative to HashMap that has the support of maintaining the order of the elements.
HashMap in Java is a powerful data structure that allows us to store the key-pair values. It allows us to store the null value objects. We can not insert the duplicate key; if we try, it will replace that element corresponding to the respected key. We can easily perform operations such as updation, deletion, etc., on the objects. The HashMap class can be found in java.util package.
The HashMap class is declared as follows:
Some key points about HashMap are as following:
Consider the below example to implement the HashMap and store the key-pair values:
Iterating Hashmap... 1 Chris 2 Morris 3 Sam 4 Cruise
The LinkedHashMap class is an alternative to the HashMap class. It is quite similar to the HashMap class. As it inherits the HashMap class, so it holds all the properties and methods of the HashMap class. Additionally. It provides an easy way to maintain the order of the elements. The LinkedHashMap inherits the HashMap class and implements the Map interface.
The LinkedHashMap class is declared as follows:
Some key points about the LinkedHashMap are as following:
Consider the below example to implement the LinkedHashMap and store vlaues in it:
100 John 101 Dev 102 Arya 103 Zoya
Difference Between LinkedHashMap and HashMap
The LinkedHashMap is an alternative to HashMap with some additional features. The following are some major differences between LinkedHashMap and HashMap:
Comparison Table of LinkedHashMap and HashMap
Consider the below comparison table of HashMap and LinkedHashMap:
As we have discussed, both HashMap and LinkedHashMap data structures; both are powerful data structure. The HashMap is useful for the general-purpose hashing based collection, and the LinkedHashmap is useful for managing the chaotic ordering of the elements.