Unhandled exception executing Error

I made HeroesInventory Plugin

but have some error

Source Code:
package inventoryplugin;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Server;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.inventory.InventoryType;
import org.bukkit.event.player.PlayerChatEvent;
import org.bukkit.event.player.PlayerCommandPreprocessEvent;
import org.bukkit.event.player.PlayerEvent;
import org.bukkit.event.player.PlayerLoginEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.java.JavaPlugin;
import com.herocraftonline.heroes.Heroes;
import com.herocraftonline.heroes.characters.CharacterManager;
import com.herocraftonline.heroes.characters.Hero;
import com.herocraftonline.heroes.characters.classes.HeroClass;
import com.herocraftonline.heroes.characters.classes.HeroClassManager;
public final class HeroesInventory extends JavaPlugin {

private CharacterManager heroManager;
private HeroClassManager classManager;
private void setupHeroManager() {

Plugin plugin = getServer().getPluginManager().getPlugin("Heroes");

heroManager = ((Heroes) plugin).getCharacterManager();
}

private void setupClassManager() {

Plugin plugin = getServer().getPluginManager().getPlugin("Heroes");

classManager = ((Heroes) plugin).getClassManager();
}
public HeroClassManager getClassManager() {
return classManager;
}
public CharacterManager getHeroManager() {
return heroManager;
}

public void onEnable(){
setupHeroManager();
setupClassManager();
getLogger().info("Disabled!");
}
public void onDisable(){
getLogger().info("Enabled!");
}

public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args){
Player player = (Player) sender;
if(cmd.getName().equalsIgnoreCase("lego")){
player.sendMessage(ChatColor.AQUA + "Hello World!");
Hero hero = getHeroManager().getHero(player);
Inventory inv = Bukkit.getServer().createInventory(null, 27, hero.getName());
player.openInventory(inv);
}

return false;


}
}

Console Log:
2013-10-23 22:34:44 [INFO] kim issued server command: /lego
2013-10-23 22:34:44 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'lego' in plugin Plugin v1.5.4-SNAPSHOT
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:192)
at org.bukkit.craftbukkit.v1_6_R3.CraftServer.dispatchCommand(CraftServer.java:548)
at net.minecraft.network.NetServerHandler.func_72566_d(NetServerHandler.java:1362)
at net.minecraft.network.NetServerHandler.chat(NetServerHandler.java:1228)
at net.minecraft.network.NetServerHandler.func_72481_a(NetServerHandler.java:1171)
at net.minecraft.network.packet.Packet3Chat.func_73279_a(Packet3Chat.java:68)
at net.minecraft.network.TcpConnection.func_74428_b(TcpConnection.java:469)
at net.minecraft.network.NetServerHandler.func_72570_d(NetServerHandler.java:232)
at net.minecraft.network.NetworkListenThread.func_71747_b(NetworkListenThread.java:54)
at net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747_b(DedicatedServerListenThread.java:34)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:898)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:328)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:765)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:647)
at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)
Caused by: java.lang.NullPointerException
at inventoryplugin.HeroesInventory.onCommand(HeroesInventory.java:61)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
... 15 more

 

What is the line 61 in your code? To lazy to count.... Also please use the code button to format your code and error

 

The error lies here

Code:java

Inventory inv = Bukkit.getServer().createInventory(null, 27, hero.getName());
player.openInventory(inv);

hero.getName() is the error.

 

how to fix?

 

rlagur55
change

Code:java

 
Inventory inv = Bukkit.getServer().createInventory(null, 27, hero.getName());
player.openInventory(inv);
 

to

Code:java

 
if (hero != null) {
     Inventory inv = Bukkit.getServer().createInventory(null, 27, hero.getName());
     player.openInventory(inv);
}
 

 

I use this source

but nothing happened

 

There must've been a new stacktrace (Error). Copy the new stacktrace (if there is one) and post it.

 

Nothing is happening because hero is null, therefore skipping the code.
Without showing us your other class we cannot find the errors.

 

Sorry I make a tongueslip

MrSparkzz said: ↑

@rlagur55
change
Code:java

2. Inventory inv = Bukkit.getServer().createInventory(null, 27, hero.getName());
3. player.openInventory(inv);

to
Code:java

2. if (hero != null) {
3. Inventory inv = Bukkit.getServer().createInventory(null, 27, hero.getName());
4. player.openInventory(inv);
5. }

​

I use this source

but same error

 

You mean you get nearly the same error? The error should lie on line 62 if it is the same, but it can't be. Please post the new stack trace or tell me the error lies on line 62

 

Let see getHero() in the HeroesManager class

 

getHero

public Hero getHero(org.bukkit.entity.Player player)
Gets a hero Object from the hero mapping, if the hero does not exist then it loads in the Hero object for the player
Parameters:
player-
Returns:

 

rlagur55
I mean the code