Need Help with Plugin: Stamina bar

I need some help creating a plugin, what I'm trying to do is to replace the exp bar with a stamina bar so I will need it to slowly deplete when sprinting, sneaking, combat(using swords etc.), so when depleted you cant run, combat or sneak only walk until the bar starts to regain.
as I am new here I may not know much and I am still learning however this is what I've come up with so far:

Code:java

package plugin.main;
 
import java.util.HashMap;
import java.util.UUID;
 
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.plugin.java.JavaPlugin;
 
/**
* @author ioncann0ns
*/
public class PluginMain extends JavaPlugin implements Listener{
 
HashMap<UUID, String> mobChallengeList = new HashMap<UUID, String>();
 
@Override
public void onEnable() {
Bukkit.getPluginManager().registerEvents(new LoginListener(), this);
getLogger().info("Looking good so far!");
}
 
public void onDisable() {
getLogger().info("Bye Administrator");
}
private class LoginListener implements Listener
{
@EventHandler
public void onLogin(PlayerJoinEvent event)
{
Player player = event.getPlayer();
player.getWalkSpeed();
player.setWalkSpeed((float).07);{
player.setSneaking(false);
player.setSprinting(false);
for (int counter=0;counter<=18;counter++)
player.giveExp(1);
System.out.println("[Plugin] Player " + player.getName() + " walk speed now: " + player.getWalkSpeed() + "; sneaking: " + player.isSneaking());
}
 
}
}
}[/syntax]
 
i heard someone used fake enderdragons for the xp
 
EDIT by Moderator: merged posts, please use the edit button instead of double posting.[/Plugin]

 

learn java first.

 

I Am

 

You probably don't want to try and spawn in enderdragons but I think there is a method in the player class to give xp. So if you create a for loop so that the player is given enough xp.