Horstmann Chapter 1

The `ArrayList` class

add appends to the end

ArrayList countries = new ArrayList();

countries.add("Belgium");

countries.add("Italy");

countries.add("Thailand");

size method yields number of elements
for (int i = 0; i < countries.size(); i++) . . .
get gets an element; must cast to correct type:
String country = (String)countries.get(i);
set sets an element
countries.set(1, "France");