import java.util.ArrayList;
public class DynamicCollectionExample {
public static void main(String[] args) {
ArrayList<Integer> numbers = new ArrayList<>();
numbers.add(10);
numbers.add(20);
numbers.add(30);
int firstNumber = numbers.get(0);
numbers.remove(1);
for (int number : numbers) {
System.out.println(number);
}
}
}
