Java Problem Solving for Beginners (with solutions)

How to Add Multiple Elements to List At Once in Java 📌[All Method]️

The blog is about How to Add Multiple Elements to List At Once in Java & provides a lot of information to the novice user and the more seasoned user. If you get stuck or have questions at any point,simply comment below.
Question: What is the best solution for this problem? Answer: This blog code can help you solve errors How to Add Multiple Elements to List At Once in Java. Question:”What should you do if you run into code errors?” Answer:”By following this blog, you can find a solution.”

I needed a way to add multiple elements to my ArrayList simultaneously.

How can we do that without a loop?

Using ArrayList.addAll()

We can add all items from another collection to an ArrayList using addAll().

List<String> lst = new ArrayList<>();
lst.addAll(Arrays.asList("corgi", "shih tzu", "pug"));

First, we would have to define a new list using Arrays.asList().

Then, we can call addAll() on the original list.

Using Collections.addAll()

We can use the Collections class, which contains many static methods to operate on collections.

Using addAll(), we can add any number of elements into our collection.

List<String> lst = new ArrayList<>();
Collections.addAll(lst, "corgi", "shih tzu", "pug");

Using List.of()

As of Java 9, we can use List.of() to instantiate an immutable list.

So, if this fits your use case, feel free to use this.

List<String> lst = List.of("corgi", "shih tzu", "pug");


Now you learned, How you can use & How to Add Multiple Elements to List At Once in Java.
Final Note: Try to Avoid this type of mistake(error) in future!

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