1.16.5 My plugin isn't working.

Hello everyone, I've tried to make a plugin Stamina system but It doesn't work. Please help.
Edit: I am not sure about the method that I used, I kept the player data in hashmap and decrease them from it

Code (Text):

HashMap<Player,Float> enerny = new HashMap<>();

Here is my code:

Code (Java):

package com.Stamina;

import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerToggleSprintEvent;
import org.bukkit.scheduler.BukkitTask;
import java.util.concurrent.TimeUnit;

public class EnergyListener implements Listener {

    private final Main main;
    private int task;


    public EnergyListener(Main main) { this.main = main; }

    @EventHandler
    public void onJoin(PlayerJoinEvent e) {
        for (Player p : Bukkit.getOnlinePlayers()) {
            if(p.isOnline()) {
                if(!main.enerny.containsKey(e.getPlayer())) {
                    main.enerny.put(e.getPlayer(),20.0F);
                }
            }
                if(main.enerny.containsValue(20.0F) && main.enerny.containsKey(e.getPlayer())) {
                    p.sendMessage("Work!");
            }
                if(main.enerny.containsValue(0.0F) && main.enerny.containsKey(e.getPlayer())) {
                    p.sendMessage("ran out of stamina");
            }
        }
    }

    @EventHandler
    public void isSprints(PlayerToggleSprintEvent e) {
        Bukkit.getScheduler().runTaskTimerAsynchronously(main, new Runnable() {
            @Override
            public void run() {
                while (e.isSprinting()) {
                    main.enerny.remove(null,2F);
                    if(main.enerny.containsValue(0)){
                        break;
                    }
                }
                if(main.enerny.containsValue(0.0F)) {
                    Player p = e.getPlayer();
                    p.sendMessage("ran out of stamina");
                }
            }
        },0L ,100L);
    }
    @EventHandler
    public void rest(Player p) {
        task = Bukkit.getScheduler().scheduleAsyncRepeatingTask(main, new Runnable() {
            @Override
            public void run() {
                for(Player p : Bukkit.getOnlinePlayers()) {
                    while(p.isOnGround()) {
                        main.enerny.put(p.getPlayer(),2.0F);
                    }
                    if(main.enerny.containsValue(20.0F)) {
                        Bukkit.getScheduler().cancelTask(task);
                        break;
                    }
                }
            }
        }, 0L ,100L);
    }
    @EventHandler
    public void cancelrest(PlayerToggleSprintEvent e) {
        if(e.getPlayer().isSprinting()) {
            Bukkit.getScheduler().cancelTask(task);
        }
    }
}
 

 

I've already registered it in my main class.

 

I am sorry for not explaining this clearly. the plugin is runnable but It has a problem with my code.

 

I tried to decrease players' stamina while they were running and it doesn't work.