convert list of integer to int array in java

/**
 * @author lautturi.com
 * Java example: how to convert integer list to int array in java
 */

import java.util.*;

public class Lautturi {

	public static void main(String[] args) {
		List<Integer> al = new ArrayList<Integer>();
		for (int i = 1; i < 10; i++) {
			al.add(i);
		}
		Integer[] arr = new Integer[al.size()];
		arr = al.toArray(arr);

		System.out.println(Arrays.toString(arr));
	}
}

output:

[1, 2, 3, 4, 5, 6, 7, 8, 9]