Numbers problem

Numbers.java

package org.wecancodeit.objects.arraylists;

import java.util.ArrayList;

public class Numbers {

	public static void main(String[] args) {
		ArrayList<Integer> numbers = new ArrayList<Integer>();

		numbers.add(42);
		numbers.add(23);
		numbers.add(86);

		// to remove 23, we can assign it to an Integer (object) so that it uses
		// the remove(Object) method instead of the remove(int) method
		// the below is the same as Integer asInteger = new Integer(23);
		// Java 'boxes' this primitive for us (autoboxing).
		Integer asInteger = 23; 
		numbers.remove(asInteger);
		System.out.println(numbers);
		
		// we can also find the index of a value, then remove that index
		int index = numbers.indexOf(42);
		numbers.remove(index);
		System.out.println(numbers);
	}

}