A very strange null pointer exception

Discussion in 'Plugin Development' started by SaxSalute, Jul 1, 2012.

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    I just started coding plugins today and I am working on a home management plugin to allow players to buy and sell land on their own. I just got to a testing point and I'm running into a very strange null pointer exception.

    package com.github.SaxSalute.HomeManager;
    import org.bukkit.entity.Player;
    import org.bukkit.plugin.java.JavaPlugin;
    import org.bukkit.Location;
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.Map;
    public class HomeManager extends JavaPlugin
        //The command executor
        private HomeManagerCommandExecutor myExecutor;
        //A map of Players and the two locations that they have selected
        protected Map<Player, Location[]> selectedLocations;
        //An arraylist of all regions
        protected ArrayList<Region> regions;
        public void onEnable()
            //Creates the command executor and register the commands
            myExecutor = new HomeManagerCommandExecutor(this);
            if (myExecutor != null)
            //Registers the wand click listener
            getServer().getPluginManager().registerEvents(new WandClickListener(this), this);
            //Creates selectedLocations
            selectedLocations = new HashMap<Player, Location[]>();
            //Create regions
            regions = new ArrayList<Region>();
        public void onDisable()
            getLogger().info("Home Manager has been disabled");
    The error is on line 25, the line where I assign myExecutor as the command executor for the createhome command. It's a null pointer exception, but I can't imagine for the life of me what is null! I tried just calling 'getCommand("createhome");' and that ran error free. It's only when I add the rest of the line that I get the null pointer exception, which I assume to be on myExecutor. Please help!
  2. You always get NPEs on getCommand(...).someMethod() when you didn't specify the command in your plugin.yml.
    ferrybig likes this.
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    I just went to my plugin.yml and realized that I didn't put an 's' on commands:. I never would have caught that! Thanks!
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