What are some examples of using ArrayLists in Java?

Can you give me some examples of how to use ArrayLists in Java?

Sure! An ArrayList in Java is a resizable array implementation of the List interface. Here's a simple example:

import java.util.ArrayList;

public class Main {
    public static void main(String[] args) {
        ArrayList<String> fruits = new ArrayList<>();
        fruits.add("Apple");
        fruits.add("Banana");
        fruits.add("Cherry");
        System.out.println(fruits);
    }
}

This code creates an ArrayList of fruits and adds three items to it.

What if I want to remove an item from the ArrayList?

You can remove an item by using the remove() method. For example:

fruits.remove("Banana");
System.out.println(fruits);

This will remove "Banana" from the list.

How can I iterate over the items in an ArrayList?

You can use a for-each loop to iterate over the items. Here's an example:

for (String fruit : fruits) {
    System.out.println(fruit);
}

This will print each fruit in the ArrayList.

Are there any performance considerations when using ArrayLists?

Yes, ArrayLists are great for random access but can be slow for insertions and deletions in the middle of the list, as it requires shifting elements.