Passing ArrayList as a Function Parameter in Java

Creating an ArrayList

In this example, we’ll create an ArrayList named languages to hold a collection of programming languages.

ArrayList<String> languages = new ArrayList<>();
languages.add("Java");
languages.add("Python");
languages.add("C++");
languages.add("JavaScript");

Lambda Expressions in Action

We’ll use a lambda expression as an argument to the forEach() method to perform operations on each element in the languages ArrayList.

languages.forEach(language -> {
    System.out.println("I love " + language);
});

This approach enables us to write concise and expressive code that’s easy to read and maintain.

The Magic Happens

Notice how we’re passing the lambda expression as an argument to ArrayList.forEach(). This allows us to iterate over the languages ArrayList and execute the lambda expression on each element.

The output showcases the power of combining ArrayLists and lambda expressions in Java:

I love Java
I love Python
I love C++
I love JavaScript

Key Takeaways

• Mastering the art of passing ArrayLists as function parameters enables you to write more efficient, scalable, and maintainable code.
• This fundamental concept unlocks new possibilities in your Java projects.
• Incorporate this technique into your coding repertoire to take your Java skills to the next level.