(Bukkit )Is There a Way to do a simple cooldown after doing something, with customizable time and second showing on the item bar?

Question

I am doing a minigame plugin for minecraft and i want to make a separated class with a countdown code, and when i need it in item classes, call it and customize the time for the cooldown. Is there a way?

Answer 1

The seconds left are displayed as the Level:

public static void startCountdown(int seconds, Player p) {
    int[] countdown = new int[1];
    countdown[0] = seconds;
    final int[] scheduler = new int[1];
    scheduler[0] = Bukkit.getScheduler().scheduleAsyncRepeatingTask(plugin, new Runnable() {
        @Override
        public void run() {
            if (seconds == 0) {
                Bukkit.getScheduler().cancelTask(scheduler[0]);
            } else {
                p.setLevel(countdown[0]);
            }
            countdown[0] = countdown[0] - 1;
        }
    }, 0, 20);
}