Iterators

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

public class ArrayListIteratorExample {
    public static void main(String[] args) {
        ArrayList<String> fruits = new ArrayList<>();
        fruits.add("Apple");
        fruits.add("Banana");
        fruits.add("Cherry");
        
        Iterator<String> iterator = fruits.iterator();
        
        System.out.println("Using Iterator to traverse through the ArrayList:");
        while (iterator.hasNext()) {
            String fruit = iterator.next();
            System.out.println(fruit);
        }
        
        System.out.println("\nUsing for-each loop to traverse through the ArrayList:");
        for (String fruit : fruits) {
            System.out.println(fruit);
        }
        
        iterator = fruits.iterator(); // Reset the iterator
        while (iterator.hasNext()) {
            String fruit = iterator.next();
            if (fruit.startsWith("B")) {
                iterator.remove(); // Remove elements that start with "B"
            }
        }
        
        System.out.println("\nArrayList after removal of elements that start with 'B':");
        for (String fruit : fruits) {
            System.out.println(fruit);
        }
    }
}

//LinkedList
import java.util.LinkedList;
import java.util.Iterator;

public class LinkedListIteratorExample {
    public static void main(String[] args) {
        LinkedList<String> fruits = new LinkedList<>();
        fruits.add("Apple");
        fruits.add("Banana");
        fruits.add("Cherry");
        
        Iterator<String> iterator = fruits.iterator();
        
        System.out.println("Using Iterator to traverse through the LinkedList:");
        while (iterator.hasNext()) {
            String fruit = iterator.next();
            System.out.println(fruit);
        }
        
        System.out.println("\nUsing for-each loop to traverse through the LinkedList:");
        for (String fruit : fruits) {
            System.out.println(fruit);
        }
        
        iterator = fruits.iterator(); // Reset the iterator
        while (iterator.hasNext()) {
            String fruit = iterator.next();
            if (fruit.startsWith("B")) {
                iterator.remove(); 
            }
        }
        
        System.out.println("\nLinkedList after removal of elements that start with 'B':");
        for (String fruit : fruits) {
            System.out.println(fruit);
        }
    }
}