NPE Error

I'm getting a NPE on this:

Code:

this.db.insertQuery(query);

Here is the relevant code:

Code:

public class CListener implements Listener {
    
    private static final Logger logger = Logger.getLogger("Minecraft");
    private sqlCore db;

    public CListener(Checkpoint plugin) {
        plugin.getServer().getPluginManager().registerEvents(this, plugin);
        
        this.db = new sqlCore(logger, "[Checkpoint] ", "Checkpoint", Checkpoint.pFolder.getPath());
    }

...

Code:

            if(Checkpoint.doing.containsKey(event.getPlayer().getName())) {
                if(Checkpoint.doing.get(event.getPlayer().getName()) == "checkpoint") {
                    String query = "INSERT INTO checkpoints (finish, x, y, z) VALUES (false, " + event.getClickedBlock().getX() + ", " +
                            event.getClickedBlock().getY() + ", " + event.getClickedBlock().getZ() + ");";
                    this.db.insertQuery(query);
                    event.getPlayer().sendMessage(ChatColor.GREEN + "[Checkpoint] Checkpoint Set!");
                    Checkpoint.doing.remove(event.getPlayer().getName());
                }

I am using alta189's SQLite library.

 

You gave too little code.

Code:

this.db = new sqlCore

give above:

Code:

logger.info("=====creating db object...");

compile and run, and check if this message is send to console. if not, then db is null.
I think the "public CListener(Checkpoint plugin)" is not called.

 

thx. I fixed it using your help. I forgot to initialize() on my second class, which is necessary for some reason.