How do I use ArrayList in Java?

How do I use ArrayList in Java?

You can use ArrayList in Java by importing the java.util package and creating an instance of ArrayList. For example: ArrayList<String> list = new ArrayList<>();.

What methods can I use with ArrayList?

ArrayList provides several methods like add(), remove(), get(), and size(). For instance, list.add("Hello"); adds an element.

Can I store different data types in an ArrayList?

No, ArrayList is type-safe. You can only store elements of the specified type. If you need different types, consider using ArrayList<Object>.

How do I iterate over an ArrayList?

You can iterate using a for loop or an enhanced for loop. For example: for(String item : list) { System.out.println(item); }.

What is the difference between ArrayList and LinkedList?

ArrayList is backed by an array, making it faster for random access, while LinkedList is better for frequent insertions and deletions.