void main() {
    ArrayList<String> votes = new ArrayList<>(List.of("yes", "no", "yes", "yes", "no"));

    IO.println(votes.indexOf("no"));
    IO.println(votes.contains("yes"));
    IO.println(votes.contains("maybe"));
    IO.println(votes.isEmpty());
    IO.println(Collections.frequency(votes, "yes"));
    IO.println(votes.subList(1, 3));
}

// From Groundwork, chapter 7 (ch07-arrays-and-lists), box 16.
// This example is from Groundwork, licensed CC BY-NC-SA 4.0.
// Run with: java ch07_16.java