BlockState cast null?

ERROR:

Code:java

[23:17:40 ERROR]: Could not pass event PlayerInteractEvent to NextKits v1.0
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:320) ~[spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:486) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:471) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:195) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:165) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:988) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.PacketPlayInArmAnimation.a(SourceFile:43) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.PacketPlayInArmAnimation.handle(SourceFile:9) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:146) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:655) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:250) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:545) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:457) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
Caused by: java.lang.NullPointerException
    at com.core.mayodwarf.Main.onInteract(Main.java:36) ~[?:?]
    at sun.reflect.GeneratedMethodAccessor251.invoke(Unknown Source) ~[?:?]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[?:1.6.0_65]
    at java.lang.reflect.Method.invoke(Method.java:597) ~[?:1.6.0_65]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:318) ~[spigot.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
    ... 15 more

CODE:

Code:java

package com.core.mayodwarf;
 
import org.bukkit.ChatColor;
import org.bukkit.block.Block;
import org.bukkit.block.BlockState;
import org.bukkit.block.Sign;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.java.JavaPlugin;
 
import java.util.ArrayList;
import java.util.List;
 
/**
* Created with IntelliJ IDEA.
* User: MayoDwarf
* Date: 2/25/14
* Time: 9:35 PM
* To change this template use File | Settings | File Templates.
*/
public class Main extends JavaPlugin implements Listener {
    private FileConfiguration config;
    public void onEnable() {
        this.getConfig();
        this.getConfig().options().copyDefaults(true);
        this.getServer().getPluginManager().registerEvents(this, this);
    }
    public void onDisable() {}
    @EventHandler
    public void onInteract(PlayerInteractEvent evt) {
        Block b = evt.getClickedBlock();
        BlockState bs = b.getState();
        if(bs instanceof Sign) {
            Sign s = (Sign) bs;
            if(evt.getAction() == Action.RIGHT_CLICK_BLOCK) {
            if(s.getLine(0).equalsIgnoreCase("[SaveKit]")) {
                if(evt.getPlayer().hasPermission("Kits."+s.getLine(1).toString())) {
                    if(getConfig().contains("Players."+evt.getPlayer().getName()+"."+s.getLine(1).toString()+".kit")) {
                        List<ItemStack> list1 = (List<ItemStack>) this.getConfig().getList("Players." + evt.getPlayer().getName() + "." + s.getLine(1) + ".kit");
                        list1.clear();
                    }
                    for(ItemStack items : evt.getPlayer().getInventory().getContents()) {
                    if(items !=null) {
                    List<ItemStack> list = (List<ItemStack>) this.getConfig().get("Players."+evt.getPlayer().getName()+"."+s.getLine(1)+".kit", new ArrayList<ItemStack>());
                    list.add(items);
                    getConfig().set("Players." + evt.getPlayer().getName() + "." + s.getLine(1).toString() + ".kit", list);
                    saveConfig();
                        }
                    }
                        getConfig().set("Players."+evt.getPlayer().getName()+"."+s.getLine(1).toString()+".armor", evt.getPlayer().getInventory().getArmorContents());
                        saveConfig();
                evt.getPlayer().sendMessage(ChatColor.GREEN+"Kit "+ChatColor.RED+""+s.getLine(1)+ChatColor.GREEN+" has been saved!");
                }
            }
            else if(s.getLine(0).equalsIgnoreCase("[LoadKit]")) {
                if(evt.getPlayer().hasPermission("Kits."+s.getLine(1))) {
                if(getConfig().contains("Players."+evt.getPlayer().getName()+"."+s.getLine(1).toString()+".kit")) {
                    List<ItemStack> kit = (List<ItemStack>) this.getConfig().getList("Players."+evt.getPlayer().getName()+"."+s.getLine(1).toString()+".kit");
                    evt.getPlayer().getInventory().clear();
                    evt.getPlayer().getInventory().setArmorContents(null);
                    for(ItemStack stacks : kit) {
                        evt.getPlayer().getInventory().addItem(stacks.clone());
                    }
                    ItemStack[] items = (ItemStack[]) getConfig().get("Players."+evt.getPlayer().getName()+"."+s.getLine(1).toString()+".armor");
                    evt.getPlayer().getInventory().setArmorContents(items);
                    evt.getPlayer().updateInventory();
                    evt.getPlayer().sendMessage(ChatColor.AQUA+"Kit "+ChatColor.RED+""+s.getLine(1)+ChatColor.AQUA+" has been loaded!");
                        }
                    }
                }
            }
        }
    }
}

 

I'd suggest taking a look @ https://forums.bukkit.org/threads/solved-blockstate-nullpointer-issue.61232/

I believe they fix the issue you're having troubles with.

 

MayoDwarf
You're clicking air. Check action before getting block.