Recipe couldn't pass event PlayerInteractEvent?

Here my code:

Code:

List<String> lore_2 = new ArrayList<String>();
        String name_2 = ChatColor.DARK_RED + "Fire Sword";
       ItemStack sword_2 = new ItemStack(Material.IRON_SWORD, 1);
       ItemMeta meta_2 = sword_2.getItemMeta();
       lore_2.add(ChatColor.DARK_AQUA + "Sword of fire! Right click to use.");
       meta_2.setDisplayName(name_2);
       meta_2.setLore(lore_2);
       meta_2.addEnchant(Enchantment.FIRE_ASPECT, 1, false);
       sword_2.setItemMeta(meta_2);
       ShapedRecipe Sword_2 = new ShapedRecipe(sword_2);
       Sword_2.shape(new String[] { "I", "B", "S" }).setIngredient('I', Material.IRON_INGOT).setIngredient('B', Material.BLAZE_POWDER).setIngredient('S', Material.IRON_SWORD);
       Bukkit.getServer().addRecipe(Sword_2);
       
        if (player.getInventory().getItemInHand().equals(sword_2)){
            if (player.isSneaking() && e.getAction() == Action.RIGHT_CLICK_AIR){
                if (player.getFoodLevel() >= 5){
                    if (!(cooldown.contains(player.getUniqueId()))){
                        player.getLocation().getWorld().playEffect(player.getLocation(), Effect.MOBSPAWNER_FLAMES, 5);
                        player.addPotionEffect(new PotionEffect(PotionEffectType.FIRE_RESISTANCE, 200, 1));
                        player.sendMessage(ChatColor.DARK_RED + "[" + ChatColor.RED + "Fire" + ChatColor.DARK_RED + "] " + ChatColor.DARK_AQUA + "Bạn kháng lửa!");
                        player.setFoodLevel(player.getFoodLevel() - 5);
                        cooldown.add(player.getUniqueId());
                        Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(this, new Runnable(){
                            public void run(){
                                cooldown.remove(player.getUniqueId());
                                player.getLocation().getWorld().playEffect(player.getLocation(), Effect.MOBSPAWNER_FLAMES, 5);
                                player.sendMessage(ChatColor.DARK_RED + "[" + ChatColor.RED + "Fire" + ChatColor.DARK_RED + "] " + ChatColor.DARK_GREEN + "Hết thuốc!");
                            }
                        }, 200);
                    }
                }
            }
        }

My error:

Code:

Could not pass event PlayerInteractEvent to MyCraft v1.1
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:320) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:486) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:471) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:195) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.PlayerInteractManager.interact(PlayerInteractManager.java:374) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:628) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.PacketPlayInBlockPlace.a(SourceFile:60) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.PacketPlayInBlockPlace.handle(SourceFile:9) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:146) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:655) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:250) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:545) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:457) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
Caused by: java.lang.NoClassDefFoundError: me/summc/mycraft/Main$4
    at me.summc.mycraft.Main.onInventoryClick(Main.java:138) ~[?:?]
    at sun.reflect.GeneratedMethodAccessor186.invoke(Unknown Source) ~[?:?]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_72]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_72]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:318) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    ... 15 more
Caused by: java.lang.ClassNotFoundException: me.summc.mycraft.Main$4
    at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.7.0_72]
    at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.7.0_72]
    at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_72]
    at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.7.0_72]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_72]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_72]
    at me.summc.mycraft.Main.onInventoryClick(Main.java:138) ~[?:?]
    at sun.reflect.GeneratedMethodAccessor186.invoke(Unknown Source) ~[?:?]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_72]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_72]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:318) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    ... 15 more

How i can fixed?

 

Caused by: java.lang.ClassNotFoundException: me.summc.mycraft.Main$4
do you depend on any api's?
that essentially means that a class that was used while compiling the plugin, is not present after the compilation.

 

@mine-care
I asked how i can fixed, not asked what is that error

 

@sum_17427 and i asked for further information...

 

@sum_17427 Your attempting to use the class 'me.summc.mycraft.Main' which does not exist.