Java initial size for an arraylist

/**
 * @author lautturi.com
 * Java example: create an arraylist with size in java
 */

import java.util.*;

public class Lautturi {

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

	}
}

output:

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