How do I iterate over a list in Java using an iterator?

How do I iterate over a list in Java using an iterator?

You can use the Iterator interface in Java to iterate over a list. First, create an Iterator object from your list, then use the hasNext() and next() methods to traverse the list.

Can you show me a code example?

Sure! Here's a simple example:

import java.util.ArrayList;
import java.util.Iterator;

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

        Iterator<String> iterator = list.iterator();
        while (iterator.hasNext()) {
            System.out.println(iterator.next());
        }
    }
}

What if I want to remove an item while iterating?

You can use the remove() method of the Iterator. Here's how you can modify the previous example to remove an item:

while (iterator.hasNext()) {
    String fruit = iterator.next();
    if (fruit.equals("Banana")) {
        iterator.remove();
    }
}

Are there any alternatives to using an iterator?

Yes, you can also use a for-each loop or Java Streams for iteration, which can be more concise.