import java.util.ArrayList;

public class Main {

    public static void main(String[] args) {
        ArrayList list = new ArrayList();
        Integer a = new Integer(3);
        list.add(a);
        Integer b = new Integer(2);
        list.add(b);
        Integer c = new Integer(3);
        list.add(c);
        System.out.println("c.equals(a) is "+c.equals(a));
        list.remove(c);
    }
}