Bukkit.getScheduler().scheduleSyncRepeatingTask(plugin, new Runnable() {
@Override
public void run() {
Bukkit.broadcastMessage("This message is shown immediately and then repeated every second");
}
}, 0L, 20L); //0 Tick initial delay, 20 Tick (1 Second) between repeatsint taskID;
public void startCountdown(){
taskID = Bukkit.getServer().getScheduler().scheduleSyncRepeatingTask(this,new Countdown(),20L,20L);
}
public void stopCountdown(){
Bukkit.getServer().getScheduler().cancelTask(taskID);
}
// 20L = 1 Second
private HashMap<UUID, Long> map = new HashMap<UUID, Long>();
@EventHandler
public void onJoin(PlayerJoinEvent event) {
map.put(event.getPlayer().getUniqueID(), Calendar.getInstance().getTime().getTime());
}