    01: import java.util.*;
    02:
    03: public class CountrySortTest
    04: {
    05:    public static void main(String[] args)
    06:    {
    07:       ArrayList countries = new ArrayList();
    08:       countries.add(new Country("Uruguay", 176220));
    09:       countries.add(new Country("Thailand", 514000));
    10:       countries.add(new Country("Belgium", 30510));
    11:       Collections.sort(countries);
    12:          // now the array list is sorted by area
    13:       for (int i = 0; i < countries.size(); i++)
    14:       {
    15:          Country c = (Country) countries.get(i);
    16:          System.out.println(c.getName() + " " + c.getArea());
    17:       }
    18:    }
    19: }
    20: