Reading from a file

Hello, Im trying to read from a file first i tried putting it in a class that didn't work then i tried putting it like this

Code:

public static LinkedList PlayerList = new LinkedList();
   public static void ReadWhitelist()
   {
       PlayerList.clear();
       File dir2 = new File("");
           File fileName = new File(dir2.getAbsolutePath() + "\\whitelist.txt");
            Scanner file;
            try {
            file = new Scanner(fileName);
            String temp = "ttttt";
            while(temp.length() > 0)
            {
             temp = file.nextLine().toLowerCase();
             PlayerList.add(temp);
            }
            } catch (FileNotFoundException e) {
            //do something else.
            }

   }

This isn't working either i have no idea why when i call the /wl refresh i get this error (happens even if it is in a onlogin /whatever)

Code:

2011-jan-19 15:17:45 org.bukkit.plugin.SimplePluginManager callEvent
ALLVARLIG: Could not pass event PLAYER_COMMAND to Whitelist
java.util.NoSuchElementException: No line found
        at java.util.Scanner.nextLine(Unknown Source)
        at com.bukkit.Logon.Whitelist.Whitelist.ReadWhitelist(Whitelist.java:60)

        at com.bukkit.Logon.Whitelist.WhitelistPlayerListener.onPlayerCommand(Wh
itelistPlayerListener.java:42)
        at org.bukkit.plugin.java.JavaPluginLoader.callEvent(JavaPluginLoader.ja
va:134)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:199)
        at net.minecraft.server.NetServerHandler.c(NetServerHandler.java:540)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:521)
        at net.minecraft.server.Packet3Chat.a(SourceFile:24)
        at net.minecraft.server.NetworkManager.a(SourceFile:232)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:63)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:104)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:261)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:197)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:512)

I have no idea what to do any ideas ?

Thanks

 

I don't have time so i haven't read the whole code yet. Seems like you are trying to read something out of an empty file. The exception you catch is only for file not found and not if it's empty. Check if there is a line

 

Just a comment on your code, do not use '\\' separators (WIN-only) or '/' separators (*NIX) only. There is a function to call that puts a separator itself:

Code:

File.separator

 

dropped that shit did like this instead

Code:

System.out.println("Starting to Readfile");
       PlayerList.clear();
       File dir2 = new File("");
           File fileName = new File("whitelist.txt");

            try {
                    FileReader h = new FileReader(fileName);
                    BufferedReader br = new BufferedReader(h);
                    String temp = "ttttt";
                    while(temp.length() > 0)
                    {
                     temp = br.readLine();
                     PlayerList.add(temp);
                     System.out.println("Added user: " + temp);

                    }

            } catch (FileNotFoundException e) {}
              catch(IOException h){}

same error ...

 

Can you post your entire .java file?

 

Fixed it ... You guys should look over the nullpointerexception i think ...
Because it calls it even tho it still works so if i catch it and just continue on it works flawlessly

 

Lol, that's not really a fix that's just a hack around it. If you get NullPointerException and do not know where it came from, something is wrong with your code.

And please do not reply "catching NullPointerException is bad? you suck" or something like that, because I didn't say that.