File returns a null pointer

So I get a stacktrace, telling me that at line 41 there is a nullpointer expection when I place my block. I think, "Ok so file could be null, I'll add a null check." Still nothing, so I think "is it possible that my file variable is returning null?" And I can't seem to find the issue as the file is written in the correct directory. Any help?


StackTrace if it helps:

Code:

[17:58:39 ERROR]: Could not pass event BlockPlaceEvent to BBBlocks v0.0.3
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:294) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:501) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:486) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at org.bukkit.craftbukkit.v1_7_R3.event.CraftEventFactory.callBlockPlace
Event(CraftEventFactory.java:138) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g868
8bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.ItemStack.placeItem(ItemStack.java:142)
[craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.PlayerInteractManager.interact(PlayerInt
eractManager.java:390) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092j
nks]
        at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java
:629) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.PacketPlayInBlockPlace.a(SourceFile:60)
[craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.PacketPlayInBlockPlace.handle(SourceFile
:9) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:157
) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.ServerConnection.c(SourceFile:134) [craf
tbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:6
67) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:2
60) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:5
58) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java
:469) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:6
28) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
Caused by: java.lang.NullPointerException
        at me.creeoer.bb.handlers.LandChecker.canPlayerPlaceSchematic(LandChecke
r.java:41) ~[?:?]
        at me.creeoer.bb.main.PlayerListener.buildlingPlace(PlayerListener.java:
166) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0
_67]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0
_67]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.7.0_67]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_67]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:292) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        ... 16 more
>

Line where it tells me to look:

Code:java

 public boolean canPlayerPlaceSchematic(String schematicname, Player player) throws DataException, IOException {
 
File schematicsave = new File(main.getDataFolder() + File.separator + "schematics" + File.separator + schematicname + ".schematic");
 
//Just checks if any protection and returns true or false if player has access or not accordingly
 

How the name of the file is determined (Note that BB Block is green, when i replace the string must i use ChatColor.GREEN + the string?)

Code:java

 public void buildlingPlace(BlockPlaceEvent e) throws MaxChangedBlocksException, DataException, IOException{
Player player = e.getPlayer();
ItemStack sas = e.getItemInHand();
ItemMeta im = sas.getItemMeta();
 
if(im.getDisplayName() != null) {
//Just debugging
Bukkit.broadcastMessage("debuggs");
if(im.getDisplayName().contains("BB Block")){
//This prints
Bukkit.broadcastMessage("yooo i contain bb block");
String building = im.getDisplayName().replace("BB Block", "");
 
 
 
 
 
 
if (land.canPlayerPlaceSchematic(building, player) == true) {

 

Did you try to debug the Code? Normaly you don't get a NPE by creating a new Object (Only when Java has a BIG Prob), so I'ld guess it's a problem with your "main.getDataFolder()". Just save every step into a variable and print it out and send the output.

 

Creeoer Post your entire class and show us where you initialize 'main.'

 

Skionz
Here:

Code:

package me.creeoer.bb.handlers;
 
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
 
import me.creeoer.bb.main.BB;
import me.ryanhamshire.GriefPrevention.Claim;
 
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
 
import org.bukkit.util.Vector;
 
import com.massivecraft.factions.entity.BoardColls;
import com.massivecraft.factions.entity.Faction;
import com.massivecraft.factions.entity.UPlayer;
import com.sk89q.worldedit.CuboidClipboard;
 
import com.sk89q.worldedit.data.DataException;
import com.sk89q.worldguard.protection.ApplicableRegionSet;
import com.sk89q.worldguard.protection.managers.RegionManager;
 
public class LandChecker{
BB main = BB.getInstance();
   
 
                 
   
     
 
   
   
   
 
    public boolean canPlayerPlaceSchematic(String schematicname, Player player) throws DataException, IOException {   
       
          File schematicsave = new File(main.getDataFolder() + File.separator + "schematics" + File.separator + schematicname + ".schematic");
         
         
         
        CuboidClipboard cc = CuboidClipboard.loadSchematic(schematicsave);
        int x = cc.getLength();
        int y = cc.getHeight();
        int z = cc.getWidth();
        int xx = x + player.getLocation().getBlockX();
        int yy = y + player.getLocation().getBlockY();
        int zz = z + player.getLocation().getBlockZ();
        Location schematic = new Location(player.getWorld(),xx,yy,zz);
       
 
       
 
       
       
       
 
       
        //good
        if(main.getFactions() != null) {
            Faction faction = BoardColls.get().getFactionAt(com.massivecraft.massivecore.ps.PS.valueOf(schematic));       
            if (faction !=null) {
            List<UPlayer> fplayers = faction.getUPlayers();
              Player playername = Bukkit.getPlayerExact(player.getName());
              UPlayer uplayer = UPlayer.get(player);
             
            if(fplayers.contains(uplayer)) {
                return true;
            }
            return false;
            }
        }
   
       
       
       
        //Good
        if(main.getGriefPrevention() != null) {
            Claim claim = main.getGriefPrevention().dataStore.getClaimAt(schematic, true, null);
            String owner = claim.getOwnerName();
            if(claim != null) {
                  if (owner == player.getName()) {
                      return true;
                  }
                  return false;
            }
           
        }
       
           
           
           
           
           
           
           
       
       
       
       
       
        //Good
        if (main.getWorldGuard() != null) {
            com.sk89q.worldguard.LocalPlayer p = main.getWorldGuard().wrapPlayer(player);
            RegionManager regionManager = main.getWorldGuard().getRegionManager(player.getWorld());
     
            if(regionManager !=null) {
                ApplicableRegionSet set = regionManager.getApplicableRegions(schematic);
                //Returns a true or false boolean based on whether or not this player has access to the region
                return set.canBuild(p);
               
            }
        }
       
       
       
       
        //Good
            if (main.getGriefPrevention() == null && main.getFactions() == null && main.getWorldGuard() == null) {
            return true;
        }
        return false;
       
       
       
       
 
    }
    public Vector turntoVector(Location location) {
          double pitch = ((location.getPitch() + 90) * Math.PI) / 180;
          double yaw  = ((location.getYaw() + 90)  * Math.PI) / 180;
          double xxx = Math.sin(pitch) * Math.cos(yaw);
          double yyy = Math.sin(pitch) * Math.sin(yaw);
          double zzz = Math.cos(pitch);
          Vector origin = new Vector(xxx, zzz, yyy);
         
 
          return origin;
    }
 
 
 
 
 
 
public boolean doesFileExist(File file){
    File folder = new File(BB.getInstance().getDataFolder() + File.separator + "schematics");
    List<File> files = Arrays.asList(folder);
      if(files.contains(file)){
         
          return true;
      }
      return false;
}
}

 

Creeoer Try initializing 'main' in the method.

 

Skionz
Well it partially worked, now I'm gettinga file not found exepction. Anyways I'll fix this myself from now on, thanks. And why does initalizng the variable inside the method make a difference anyways?