Solved Trouble with abstract commands, returns a nullpointerexception

Hey, I have a problem when trying to abstract a command. I have a HashMap in my Main class containing all of my commands. All of the commands are registered in the constructors of the SubClasses. Could someone please explain why I'm getting a nullpointerexception? Thanks!

Abstract class

Code (Text):

public abstract class BansCommand implements CommandExecutor {
    String commandName;
    String permission;
    boolean canConsoleUse;
    private Main plugin;

    public BansCommand(final String commandName, final String permission, final boolean canConsoleUse){
        this.commandName = commandName;
        this.permission = permission;
        this.canConsoleUse = canConsoleUse;
        plugin.getCommand(commandName).setExecutor(this);
        plugin.commands.put(commandName, this);
    }

    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args){
        if(!plugin.commands.containsKey(commandLabel)){
            return true;
        }

        if(!sender.hasPermission(permission)){
            sender.sendMessage(colorize("&cYou do not have permission."));
            return true;
        }

        if(!canConsoleUse && !(sender instanceof Player)){
            sender.sendMessage(colorize("&cOnly players can execute this command."));
            return true;
        }

        execute(sender, args);
        return true;
    }

    public abstract void execute(final CommandSender sender, final String[] args);

    public String colorize(String message){
        return ChatColor.translateAlternateColorCodes('&', message);
    }
}
 

Main class

Code (Text):

public class Main extends JavaPlugin {

    FileConfiguration config;
    File cfile;
    FileConfiguration bans;
    File bfile;
    public static HashMap<String, BansCommand> commands;

    public void onEnable(){
        cfile = new File(getDataFolder(), "config.yml");
        config = YamlConfiguration.loadConfiguration(cfile);
        config.options().copyDefaults(true);
        save(cfile, config);
        bfile = new File(getDataFolder(), "bans.yml");
        bans = YamlConfiguration.loadConfiguration(bfile);
        bans.options().copyDefaults(true);
        save(bfile, bans);
        commands = new HashMap<String, BansCommand>();
        registerCommands();
        this.getServer().getPluginManager().registerEvents(new JoinListener(), this);
    }
    public void registerCommands(){
        new TestCommand();
    }

    public void save(File file, FileConfiguration config){
        try{
            config.save(file);
        }catch(IOException e){
            getLogger().warning("Could not save " + file.getName());
        }
    }

    public FileConfiguration getConfig(){
        return config;
    }

    public FileConfiguration getBans() {
        return bans;
    }
}
 

TestCommand subclass

Code (Text):

public class TestCommand extends BansCommand {

    public TestCommand(){
        super("test", "test.test", true);
    }

    public void execute(CommandSender sender, String[] args){
        sender.sendMessage("You ran the test command");
    }

}
 

Stack trace: http://pastebin.com/guZCAGbf

 

Here is the stack trace, could you elaborate more?

Code (Text):

[01:59:11 ERROR]: Error occurred while enabling Bans v1.0 (Is it up to date?)
java.lang.NullPointerException
        at com.unbinding.bans.BansCommand.<init>(BansCommand.java:22) ~[?:?]
        at com.unbinding.bans.cmds.TestCommand.<init>(TestCommand.java:12) ~[?:?]
        at com.unbinding.bans.Main.registerCommands(Main.java:40) ~[?:?]
        at com.unbinding.bans.Main.onEnable(Main.java:35) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:357) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:317) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.reload(CraftServer.java:741) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.Bukkit.reload(Bukkit.java:535) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:627) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:412) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:375) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
 

 

I read your post, I'm just confused on what value to give it.

 

Constructor from abstract class. I added the main value, how do I put it in the subcommand class for super?

Code (Text):

public BansCommand(Main main, final String commandName, final String permission, final boolean canConsoleUse){
    this.commandName = commandName;
    this.permission = permission;
    this.canConsoleUse = canConsoleUse;
    plugin.getCommand(commandName).setExecutor(this);
    plugin.commands.put(commandName, this);
    this.plugin = main;
}
 

 

Thank you so much, fixed it!

Marking as solved.