How Do I Create A Cooldown For A Command?

Hi. Im making a plugin that kills everybody. I type the command and it works. I want a cooldown for 5 minutes so people dont spam the command because its really OP. Here is my plugin:

Code:java

package plugins.mkezar;
 
import java.util.List;
 
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Sound;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Damageable;
import org.bukkit.entity.Player;
import org.bukkit.entity.Entity;
public class Fusrodahs extends JavaPlugin {
@SuppressWarnings("deprecation")
public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
final Player player = (Player)sender;
 
 
if(commandLabel.equalsIgnoreCase("fusrohdah")) {
//onCommand stuff
 
if(sender instanceof Player){
Player player1 = (Player) sender;
player.sendMessage(ChatColor.DARK_PURPLE + "" + ChatColor.BOLD + "FUS-ROH-DAH!");
player1.playSound(player1.getLocation(),Sound.ENDERDRAGON_DEATH,1,1);
Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(this, new Runnable() {
public void run() {
 
}
}, 6000L);
List <Entity> entities = player1.getNearbyEntities(20,20,20);
for(Entity e : entities){
Damageable d = (Damageable) e;
d.setHealth(0);
 
 
 
}
}
}
return false;
 
}
}
 

Thank you!!!
-mkezar

 

Use an ArrayList.

 

webbhead This is good...... Could u send me a link to a tutorial or a desc about an ArrayList?

 

mkezar

 

webbhead This Is Not What I wanted I want a CoolDown not a freeze plugin.

 

mkezar

 

mkezar

You can still use an array, put player name in as index and time as value, when player chats, check when he last spoke (array value (time) - current time) if it's more than (>) 5 minutes remove player from array and send the command or else, cancel the event. When player quits make sure to remove him from array as well.

Might be long and painful but that's just my idea lol.