Immutable ArrayList, HashSet and HashMap with Coding Examples

In this video tutorial, we will see how to make an immutable ArrayList, HashSet, and HashMap with coding examples.

I have forgotten to cover the benefits of immutable collections. Here is a common use case to use immutable collections:

I have forgotten to cover the benefits of immutable collections. Here is a common use case to use immutable collections.

Use Case:
Whether to use an unmodifiable collection or a modifiable collection depends on the data in the collection.

An unmodifiable collection provides space efficiency benefits and prevents the collection from accidentally being modified, which might cause the program to work incorrectly. An unmodifiable collection is recommended for the following cases:
1. Collections that are initialized from constants that are known when the program is written.
2. Collections that are initialized at the beginning of a program from data that is computed or is read from something such as a configuration file.

One more advantage of an immutable collection is that it is automatically thread safe. After you create a collection, you can hand it to multiple threads, and they will all see a consistent view.

Get source code of this tutorial from my blog posts:
1. https://www.javaguides.net/2020/03/immutable-arraylist-in-java-with-example.html
2. https://www.javaguides.net/2020/03/create-immutable-hashmap-in-java.html.

#java #javaguides #collections