iterator

 ArrayList<Object> c = new ArrayList<>();
    String s="abc";
    c.add(s);
    c.add("abc");
    c.add("lps");
    c.add(123);
    c.add("hello");
    System.out.println(c);
    System.out.println();
    Iterator<Object> ite = c.iterator();
    while (ite.hasNext()){
        System.out.println(ite.next());
    }
}