import java.util.*;
public class ArrayListDemo
{
public static void main(String[] args)
{
ArrayList<String> al = new ArrayList<>();
al.add("one"); al.add("two"); al.add("three"); al.add("four"); 
al.add("five");
System.out.println("Contents: " + al);
System.out.println("Size: " + al.size());
System.out.println();
for(String s: al)
System.out.println(s);
System.out.println();
for(int i=0; i<al.size(); i++)
System.out.println(al.get(i));
System.out.println();
Iterator it = al.iterator();
ListIterator lit = al.listIterator();
while(it.hasNext())
System.out.println(it.next());
System.out.println();
while(lit.hasNext())
System.out.println(lit.next());
System.out.println();
while(lit.hasPrevious())
System.out.println(lit.previous());
System.out.println();
al.add(0, "zero");
System.out.println("Contents: " + al);
System.out.println("Size: " + al.size());
al.remove("one"); al.remove(0);
System.out.println("Contents: " + al);
System.out.println("Size: " + al.size())
}
}