java how to get the sum of all arraylist elements

/**
 * @author lautturi.com
 * Java example: sum all the elements in arraylist
 */

import java.util.*;

public class Lautturi {

	public static void main(String[] args) {

		ArrayList<Integer> list = new ArrayList<Integer>();
		for (int i = 1; i < 10; i++) {
			list.add(i);
		}
		System.out.println("Arraylist:"+list);

		int sum = 0;
		for (int i = 0; i < list.size(); i++) {
			sum += list.get(i);
		}

		System.out.println("sum:"+sum);

	}
}

output:

Arraylist:[1, 2, 3, 4, 5, 6, 7, 8, 9]
sum:45