How can i put my kits in my inv?

I am very busy with a kitpvp plugin i am working on! but, i am a beginner. so i dont know alot.
Can someone tell me how i can put my kits into my inventorygui?

Main:

Code:

package me.mepvp.main;

import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.enchantments.Enchantment;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.block.Action;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;

import me.mepvp.listeners.PlayerListeners;

public class Main extends JavaPlugin {

    private static Main instance;

    public void log(String string) {
        System.out.println(string);
      
    }

    public void registerCommands() {

    }

    public static Main getInstance() {
        return instance;

    }

    public void registerListeners() {
        PluginManager pm = getServer().getPluginManager();
        pm.registerEvents(new PlayerListeners(this), this);

    }

    public void onEnable() {
        registerListeners();
        registerCommands();
        instance = null;
    }

    public void onDisable() {
        instance = null;
      
    }

    public boolean onCommand(Command sender, Command cmd, String commandLabel, String[] args) {

        if (cmd.getName().equalsIgnoreCase("Warrior") && sender instanceof Player) {

            Player p = (Player) sender;
            p.sendMessage("U have chosen the Warrior kit!");

            p.getInventory().clear();
            ItemStack WarriorSword = new ItemStack(Material.STONE_SWORD);
            ItemMeta m = WarriorSword.getItemMeta();
            WarriorSword.setItemMeta(m);
            p.getInventory().clear();
            p.getInventory().addItem(WarriorSword);
            p.getInventory().setChestplate(new ItemStack(Material.IRON_CHESTPLATE));

        }

        if (cmd.getName().equalsIgnoreCase("Archer") && sender instanceof Player) {

            Player p = (Player) sender;
            p.sendMessage("U have chosen the Archer kit!");

            p.getInventory().clear();
            ItemStack ArcherBow = new ItemStack(Material.BOW);
            ItemMeta m = ArcherBow.getItemMeta();
            ArcherBow.addEnchantment(Enchantment.ARROW_INFINITE, 1);
            ArcherBow.setItemMeta(m);
            p.getInventory().clear();
            p.getInventory().addItem(new ItemStack(Material.WOOD_SWORD));
            p.getInventory().addItem(ArcherBow);      
            p.getInventory().addItem(new ItemStack(Material.ARROW, 1));
            p.getInventory().setChestplate(new ItemStack(Material.LEATHER_CHESTPLATE));
            p.getInventory().setChestplate(new ItemStack(Material.LEATHER_LEGGINGS));
        }
        return false;
      
    }

}

PlayerListeners:

Code:

package me.mepvp.listeners;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.entity.Item;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.entity.PlayerDeathEvent;
import org.bukkit.event.inventory.InventoryClickEvent;
import org.bukkit.event.player.PlayerDropItemEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.event.player.PlayerRespawnEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.potion.PotionEffect;

import me.mepvp.main.Main;

public class PlayerListeners implements Listener {

    Main plugin;
    private Inventory inv;

    public PlayerListeners(Main instance) {
        this.plugin = instance;

    }

    @EventHandler
    public void PlayerJoin(PlayerJoinEvent e) {
        Player p = e.getPlayer();
        String pname = p.getName();
        p.getInventory().clear();

        Bukkit.broadcastMessage("" + ChatColor.GRAY + e.getPlayer().getName() + ChatColor.RED + " Has joined KitPvP!");

        ItemStack kitselector = new ItemStack(Material.COMPASS);
        ItemMeta m = kitselector.getItemMeta();
        m.setDisplayName(ChatColor.RED + "Kit Selector");
        kitselector.setItemMeta(m);
        p.getInventory().setItem(4, kitselector);
      
    }
      
         @EventHandler(priority = EventPriority.MONITOR)
         public void onPlayerDropItem(PlayerDropItemEvent event) {
               event.getPlayer().setItemInHand(event.getItemDrop().getItemStack());
               event.getItemDrop().remove();
         }

         @EventHandler
          public void OnPlayerInteraction(PlayerInteractEvent e) {
            if (e.getAction()==Action.RIGHT_CLICK_AIR || e.getAction()==Action.RIGHT_CLICK_BLOCK){
              if (e.getItem()!=null && e.getItem().hasItemMeta() && e.getItem().getItemMeta().hasDisplayName() && e.getItem().getItemMeta().getDisplayName().equals(ChatColor.RED + "Kit Selector")){
              Inventory i = Bukkit.createInventory(null, 9, ChatColor.RED +"Kit Selector");
              e.getPlayer().openInventory(i);
            
              ItemStack Warrior = new ItemStack(Material.STONE_SWORD);
              ItemMeta meta = Warrior.getItemMeta();
              meta.setDisplayName(ChatColor.GRAY + "Select Warrior Kit!");
              Warrior.setItemMeta(meta);
            
            
              ItemStack Archer = new ItemStack(Material.BOW);
              ItemMeta meta1 = Warrior.getItemMeta();
              meta1.setDisplayName(ChatColor.GRAY + "Select Archer Kit!");
              Archer.setItemMeta(meta1);
            
              Inventory inv = Bukkit.createInventory(null, 9, ChatColor.RED + "Kit Selector");
            
              inv.setItem(2, Warrior);
            
              inv.setItem(6, Archer);
            
              e.getPlayer().openInventory(inv);
            
            
              }
            }
          }

    @EventHandler
    public void PlayerLeave(PlayerQuitEvent e) {
        Player p = e.getPlayer();
        String pname = p.getName();
        p.getInventory().clear();
        Bukkit.broadcastMessage("" + ChatColor.GRAY + pname + ChatColor.RED + " Has left KitPvP!");

    }

    @EventHandler
    public void Death(PlayerDeathEvent e) {

        Player p = e.getEntity();
        Player k = p.getKiller();
        e.getDrops().clear();
        e.setDeathMessage("" + ChatColor.GRAY + e.getEntity() + ChatColor.RED + " Got killed by " + ChatColor.GRAY + p.getKiller());

    }

    @EventHandler
    public void Respawn(PlayerRespawnEvent e) {
        Player p = e.getPlayer();

        ItemStack kitselector = new ItemStack(Material.COMPASS);
        ItemMeta m = kitselector.getItemMeta();
        m.setDisplayName(ChatColor.RED + "Kit Selector");
        kitselector.setItemMeta(m);
        p.getInventory().setItem(4, kitselector);

    }

}

 

@Kipnugget
Why do you create two inventorys? Remove these lines.
Inventory i = Bukkit.createInventory(null, 9, ChatColor.RED +"Kit Selector");
e.getPlayer().openInventory(i);

As they do nothing but open an empty inventory which could be causing issues with your secondary inventory.

 

Since you already have the commands /archer, /warrior. You should just make the player execute these with an Listener on InventoryClickEvent.

 

@Kipnugget Your package will likely conflict with any other plugin you make. your package should be in this format: me.<username>.<project>