Development Assistance Help with ammo!

Hello! I am getting this error. There were errors in the code below too someone help!

Code:java

[17:43:14 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'give
ammo2' in plugin HubPlugin v1.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[cra
ftbukkit.jar:git-Spigot-"606148f"]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:18
1) ~[craftbukkit.jar:git-Spigot-"606148f"]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCommand(CraftServe
r.java:643) ~[craftbukkit.jar:git-Spigot-"606148f"]
        at net.minecraft.server.v1_8_R1.PlayerConnection.handleCommand(PlayerCon
nection.java:1105) [craftbukkit.jar:git-Spigot-"606148f"]
        at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java
:940) [craftbukkit.jar:git-Spigot-"606148f"]
        at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java
:26) [craftbukkit.jar:git-Spigot-"606148f"]
        at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java
:53) [craftbukkit.jar:git-Spigot-"606148f"]
        at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [cra
ftbukkit.jar:git-Spigot-"606148f"]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.7.0_25]
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) [?:1.7.
0_25]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.7.0_25]
        at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:6
84) [craftbukkit.jar:git-Spigot-"606148f"]
        at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:3
16) [craftbukkit.jar:git-Spigot-"606148f"]
        at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:6
25) [craftbukkit.jar:git-Spigot-"606148f"]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java
:528) [craftbukkit.jar:git-Spigot-"606148f"]
        at java.lang.Thread.run(Unknown Source) [?:1.7.0_25]
Caused by: java.lang.NullPointerException
        at me.mike1665.commands.AmmoTest.onCommand(AmmoTest.java:45) ~[?:?]
        at me.mike1665.Main.Main.onCommand(Main.java:318) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[cra
ftbukkit.jar:git-Spigot-"606148f"]
        ... 15 more
 

I have no idea why its cuasing this error here is the current code:

Code:java

public class AmmoTest  implements Listener{
 
    public static Main plugin;
 
    public static void setup(Main instance) {
        plugin = instance;
    }
    public static boolean onCommand(CommandSender sender, Command cmd,
            String label, String[] a) {
        if(!(sender instanceof Player)) return false;
        Player p = (Player) sender;
        if (cmd.getName().equalsIgnoreCase("giveammo")) {
            int i = 20;
            giveAmmo(p, i);
            p.sendMessage("This " + i);
 
        }if (cmd.getName().equalsIgnoreCase("giveammo2")) {
            ItemStack snow = new ItemStack(Material.SNOW_BALL);
            ItemMeta sno = snow.getItemMeta();
//LINE 45            int ammo = plugin.getConfig().getInt(p.getUniqueId() + ".MeowAmmo");
            sno.setDisplayName(ChatColor.GREEN + "MeowBall" + ammo);
            snow.setItemMeta(sno);
            p.getInventory().addItem(snow);
 
        } else {
            sender.sendMessage(StringManager.getPrefix(MessageType.ERROR)
                    + "Something Failed");
        }
 
        return false;
    }
 
    @SuppressWarnings("deprecation")
    @EventHandler
    public void projectiles(ProjectileHitEvent event)
    {
      Projectile projectile = event.getEntity();
      if ((projectile instanceof Snowball))
      {
        Snowball snowball = (Snowball)projectile;
        if ((snowball.getShooter() instanceof Player))
        {
          Player player = (Player)snowball.getShooter();
          if ((disName(player.getItemInHand()) != null) && (disName(player.getItemInHand()).equalsIgnoreCase(ChatColor.GREEN + "MeowBall" + plugin.getConfig().getString(player.getPlayer().getUniqueId() + ".MeowAmmo")))){
              Snowball s = (Snowball)event.getEntity();
              s.getWorld().playSound(s.getLocation(), Sound.CAT_MEOW, 1.0F, 1.0F);
              ParticleLib18 lava = new ParticleLib18(me.mike1665.particles18.ParticleLib18.ParticleType.LAVA, 0.0F, 20, 0);
              ParticleLib18 hearts = new ParticleLib18(me.mike1665.particles18.ParticleLib18.ParticleType.HEART, 0.0F, 2, 0);
              ParticleLib18 largesmoke = new ParticleLib18(me.mike1665.particles18.ParticleLib18.ParticleType.SMOKE_LARGE, 0.0F, 10, 0);
              lava.sendToLocation(s.getLocation());
              hearts.sendToLocation(s.getLocation());
              largesmoke.sendToLocation(s.getLocation());
              s.getWorld().playEffect(s.getLocation(), Effect.MOBSPAWNER_FLAMES, 1);
              s.getWorld().playEffect(s.getLocation(), Effect.MOBSPAWNER_FLAMES, 1);
              player.getItemInHand().setAmount(player.getItemInHand().getAmount() - 1);
              if (player.getItemInHand().getAmount() == 1) {
                  player.setItemInHand(null);
              }
              }
        }
      }
    }
 
    public static void giveAmmo(OfflinePlayer p, int i) {
        i = i * Multiplier.ammo(p);
 // THERE WAS ERRORS HERE       plugin.getConfig().set(p.getUniqueId() + ".MeowAmmo",
                plugin.getConfig().getInt(p.getUniqueId() + ".MeowAmmo", 0) + i);
        plugin.saveFile();
    }
 
    public String disName(ItemStack i)
    {
      if (i == null) {
        return null;
      }
      if (!i.hasItemMeta()) {
        return null;
      }
      if (!i.getItemMeta().hasDisplayName()) {
        return null;
      }
      return i.getItemMeta().getDisplayName();
    }
 
}
 

 

~[craftbukkit.jar:git-Spigot-"606148f"]

Look for help on the spigot forums. Not here : (

 

Spigot and bukkit are similar.

 

VictoryShot The values you're getting from the config are null.. Make sure you set it correctly, and saved the config.

 

VictoryShot

Let's see:

1. Your reference to the main class of the plugin is public and static, it should be neither of those.
2. You have an onCommand() method that will never be invoked because this is not a CommandHandler
3. Your onCommand() is static when it shouldn't be
4. Everything is referenced statically, and it's starting to hurt my eyes
5. It's quite likely you made a mistake in your "setup()" (completely unnecessary method, as it's basically doing the job of a constructor, but not OOP) method and plugin is null

Alternatively, the value in config is null, add a default parameter to avoid unboxing null.