Solved Where am I screwing up?

Code:JAVA

package cirno;
 
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import org.bukkit.Bukkit;
import org.bukkit.map.MapView;
 
public class DataSaver {
 
    Nineball root;
    boolean FileSafeForUse;
 
    public DataSaver(Nineball r){
        try {
            root = r;
            initializeFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
    public void initializeFile() throws IOException{
        File f = new File(root.getDataFolder().getAbsoluteFile(), "\\MapData.list");
        File folder = new File(root.getDataFolder().getAbsoluteFile().getAbsolutePath());
        if(!folder.exists()){
            folder.mkdir();
        }
        if(!f.exists()){
            f.createNewFile();
        }
        FileSafeForUse = true;
    }
 
    public void unloadFile(){
        FileSafeForUse = false;
    }
 
    public void setGlobalMaps(){
        if(!FileSafeForUse){
            return;
        }
        new Thread(){
            public void run(){
                for(int i=0; i < 65536; i++){
                    MapView map = Bukkit.getServer().getMap((short)i);
                    String url = getMapData(i);
                    if(url != null && !url.isEmpty()){
                        try { map.removeRenderer(map.getRenderers().get(0)); } catch(Exception e){}
                        map.addRenderer(new ImgRenderer(url));
                    }
                }
            }
        }.start();
    }
 
    public void setMapData(int id, String url){
        try {
            initializeFile();
            //WSTFGL. Tactical failure inbound! Prepare for blindness!
            new File(root.getDataFolder().getAbsoluteFile() + "\\MapDataTemp.list").createNewFile();
            PrintWriter typewriter = new PrintWriter(new FileWriter(root.getDataFolder().getAbsoluteFile() + "\\MapDataTemp.list"));
            BufferedReader eyes = new BufferedReader(new FileReader(root.getDataFolder().getAbsoluteFile() + "\\MapData.list"));
            String l;
 
            while((l = eyes.readLine()) != null){
                String[] line = l.split(" > ");
                if(line[0].equalsIgnoreCase(String.valueOf(id))){
                    typewriter.println(line[0] + " > " + url);
                } else {
                    typewriter.println(l);
                }
            }
            eyes.close();
            typewriter.flush();
            typewriter.close();
            File newData = new File(root.getDataFolder().getAbsoluteFile() + "\\MapDataTemp.list");
            unloadFile();
            new File(root.getDataFolder().getAbsoluteFile() + "\\MapData.list").delete();
            newData.renameTo(new File(root.getDataFolder().getAbsoluteFile() + "\\MapData.list"));
            initializeFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
    public String getMapData(int id){
        if(!FileSafeForUse){
            try {
                initializeFile();
                BufferedReader eyes = new BufferedReader(new FileReader(root.getDataFolder().getAbsoluteFile() + "\\MapData.list"));
                String l;
                while((l = eyes.readLine()) != null){
                    if(l.startsWith(String.valueOf(id))){
                        return l.split(" > ")[1].trim();
                    }
                }
                return null;
            } catch (IOException e){
                e.printStackTrace();
                return null;
            }
        }
        return null;
    }
}
 

Code:

15:18:20 [SEVERE] Could not load 'plugins\ImgMap.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NullPointerException
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:153)
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.
java:305)
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:230)
        at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:222)
        at org.bukkit.craftbukkit.CraftServer.reload(CraftServer.java:565)
        at org.bukkit.Bukkit.reload(Bukkit.java:183)
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:
21)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:16
8)
        at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:4
92)
        at org.bukkit.craftbukkit.CraftServer.dispatchServerCommand(CraftServer.
java:488)
        at net.minecraft.server.DedicatedServer.ah(DedicatedServer.java:248)
        at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:213)
        at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:476)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:408)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
Caused by: java.lang.NullPointerException
        at cirno.DataSaver.initializeFile(DataSaver.java:27)
        at cirno.DataSaver.<init>(DataSaver.java:20)
        at cirno.Nineball.<init>(Nineball.java:20)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:149)
        ... 14 more

Line 27 is just the initialization for the MapData file... It's not even null either; the file exists.

 

Is root null? Look at where you instantiate this class. The getDataFolder() method might also be returning null.

 

/facepalm
What an idiot I am
Thanks :3