Cooldown on logout

I made a request plugin but when any user logsout the cooldown disapears how do i make it so it keeps there?

Code:

package Commands;

import org.bukkit.Bukkit;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import com.dylanswavonski.testplugin.Main;

import net.md_5.bungee.api.ChatColor;

public class RequestCommand implements CommandExecutor {

    private Main main;
   
    public RequestCommand (Main main) {
        this.main = main;
    }
   
    public String bold = ChatColor.BOLD + "";
    public String italic = ChatColor.ITALIC + "";
    public String strikethrough = ChatColor.STRIKETHROUGH + "";
   
@SuppressWarnings("deprecation")
@Override
public boolean onCommand (CommandSender sender, Command cmd, String label, String[] args) {
   
    Player p = (Player) sender;
    if (main.cooldown.containsKey(p) && main.cooldown.get(p) > System.currentTimeMillis()) {
          
        long longRemaining = main.cooldown.get(p) - System.currentTimeMillis();
        int intRemaining = (int) (longRemaining/1000);
       
        p.sendMessage(ChatColor.DARK_RED + bold + "(!) " + ChatColor.RED + "There is " + ChatColor.GREEN +  intRemaining + ChatColor.GREEN + "s" + ChatColor.RED + " left before you can use this command again..");
          
          
       } else {
          
          
          
        if(!(sender instanceof Player)) {
            sender.sendMessage("Players only command");
            return true;
        }
        if(args.length >= 1) {
            Player t = sender.getServer().getPlayer(args[0]);
            if(t == null) {
                sender.sendMessage(ChatColor.RED + "Player ''" + ChatColor.WHITE +  args[0] + ChatColor.RED + "'' is not online!");
            } else {
                String reason = "";
                  int x = 0;
                    for (String a : args) {
                        if (x == 1) {
                            x++;
                            continue;
                        }
                        reason = reason + " " + a;
                    }
                    reason = reason.trim();
                    sender.sendMessage(ChatColor.DARK_GREEN + bold + "(!) " + ChatColor.GREEN +  "We have submitted your report and Staff has been notified globally, Thank you.");
                   
                   
                    main.cooldown.put(p, System.currentTimeMillis() + (60 * 1000));
                   
                   
                   
                    for (Player staff : Bukkit.getServer().getOnlinePlayers()) {
                        if(staff.hasPermission("report.see")) {
                            staff.sendMessage(ChatColor.GRAY + strikethrough + "-------------------------");
                            staff.sendMessage(ChatColor.DARK_RED + "* " + ChatColor.RED + "Reported: " + ChatColor.GRAY + t.getName());
                            staff.sendMessage(ChatColor.DARK_RED + "* " + ChatColor.RED + "Reporter: " + ChatColor.GRAY + p.getName() );
                            staff.sendMessage(ChatColor.DARK_RED + "* " + ChatColor.RED + "Reason: " + ChatColor.GRAY + reason);
                            staff.sendMessage(ChatColor.GRAY + strikethrough + "-------------------------");
                        }
                    }
                   
                        }
        } else {
            sender.sendMessage(ChatColor.RED + "Usage: /report <user> <reason>");
                    }
               
               
            }
    return false;
           
        }
{
   

}
{

}
{
}
}

 

as @timtower already said, first check if the sender is a player and then cast it to a player. and also don't save the player object, save his UUID. I made something similar in a plugin of mine: https://dev.bukkit.org/projects/daytime
It should be all in there, if you wan't you can decompile it and get an idea how to do it

 

You think i could get the a part of getting the UUID so i can play around with it and try to implement it?.
I'm not quite sure how to use UUID thats why i cast it to a player.

 

It's quite simple, instead of creating an ArrayList you create a HashMap<UUID, somethingelse>
when getting the values you use arraylist.get(player.getUUID()); //was coded out of mind so something could be wrong

 

Damn, I was thinking about HashMaps but wrote ArrayList, lmao