import java.util.*;    // ArrayList class is in java.util

public class ArrayListFun {

    public static void main(String[] args) {

        // Here, the type of the variable words is "ArrayList<String>"
        // In other words, "an ArrayList of String objects"
        ArrayList<String> list = new ArrayList<String>();

        // add some elements to the ArrayList
        list.add("hello");
        String x = new String("world");
        list.add(x);
        list.add("this is fun");

        // print out list
        System.out.println("list = " + list);

        // print out the zeroth and second element
        System.out.println("0th element = " + list.get(0) +
                           ", 2nd element = " + list.get(2));

        // add something to middle
        list.add(1, "middle value");
        System.out.println("list = " + list);

        // remove some things
        list.remove(1);
        list.remove(2);
        System.out.println("list = " + list);

        // ask how long the list is
        System.out.println("list size: " + list.size());
    }
}