Java List List can store multiple values are null elements

problem

List List can store multiple values ​​are null elements?

---

answer

List class interface elements are ordered, repeatable, allowing a plurality of null values;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedList;

public class test {
    public static void main(String[] args) {
        ArrayList al = new ArrayList();
        al.add(null);
        al.add(null);
        Iterator it = al.iterator();
        while (it.hasNext()) {
            System.out.println((String) it.next());
        }

        LinkedList ll = new LinkedList();
        ll.add(null);
        ll.add(null);
        it = ll.iterator();
        while (it.hasNext()) {
            System.out.println((String) it.next());
        }
    }
}