Help with a NPE?

cluter123 · Apr 3, 2016

I'm saving the inventory of a player, and then loading it, yet it gives me this NPE. I'm not sure why the NPE is happening.

Oh and whenever I reload the plugin, the plugin loads the items without any problem, but I don't want to reload the plugin every time they issue the command.

-snip-

TheDiamond06 · Mar 31, 2016

cluter123 said: ↑

What exactly does this mean? I'm saving the inventory of a player, and then loading it. When I load it, it gives me this NPE.

Oh and whenevr I reload the plugin, the plugin loads the items without any problem, but I don't want to reload the plugin every time they issue the command.

Code:

Code:

            if (args[0].equalsIgnoreCase("join")) {
                pl.pinv.set(p.getUniqueId() + ".inv", p.getInventory().getContents());
                pl.pinv.set(p.getUniqueId()+".armor", p.getInventory().getArmorContents());
                pl.pinv.set(p.getUniqueId() + ".stats.health", p.getHealth());
                pl.pinv.set(p.getUniqueId() + ".stats.hunger", p.getSaturation());
                pl.pinv.set(p.getUniqueId() + ".stats.exp", p.getExp());
                // pl.pinv.set(p.getUniqueId() + ".armor",
                // p.getInventory().getArmorContents());
                pl.saveData(pl.pinv, pl.pinvfile);
                p.getInventory().clear();
                p.getInventory().setHelmet(null);
                p.getInventory().setChestplate(null);
                p.getInventory().setLeggings(null);
                p.getInventory().setBoots(null);
                pl.joined.add(p.getName());
                p.sendMessage(pl.prefix + "You have joined the arena.");
                return true;
            }
            if (args[0].equalsIgnoreCase("leave")) {
                if (pl.joined.contains(p.getName())) {
                    @SuppressWarnings("unchecked")
                    List<ItemStack> armor = (List<ItemStack>) pl.pinv.getList(p.getUniqueId() + ".armor");
                    @SuppressWarnings("unchecked")
                    List<ItemStack> items = (List<ItemStack>) pl.pinv.getList(p.getUniqueId() + ".inv");
                    p.getInventory().setContents((ItemStack[])items.toArray(new ItemStack[items.size()]));
                    p.getInventory().setArmorContents((ItemStack[])armor.toArray(new ItemStack[armor.size()]));
                    p.setSaturation(Float.parseFloat(pl.pinv.getString(p.getUniqueId() + ".stats.hunger")));
                    p.setHealth(pl.pinv.getDouble(p.getUniqueId() + ".stats.health"));
                    p.setExp(Float.parseFloat(pl.pinv.getString(p.getUniqueId() + ".stats.exp")));
                    pl.pinv.set(p.getUniqueId().toString(), null);
                    pl.saveData(pl.pinv, pl.pinvfile);
                //    pl.joined.remove(p.getName());
                    p.sendMessage(pl.prefix + "You have left the arena.");
                    return true;
                    /*
                     * } catch (IOException e) { p.sendMessage(pl.prefix +
                     * "You have left the arena."); p.sendMessage(pl.prefix +
                     * ChatColor.RED +
                     * "Unable to load inventory. Please contact an admin.");
                     * e.printStackTrace(); return false; }
                     */
                }
                p.sendMessage(pl.prefix + "You have not joined an arena!");
                return false;
            }

Click to expand...

https://bukkit.org/threads/how-to-r...ubleshoot-your-own-plugins-by-yourself.32457/

cluter123 · Mar 31, 2016

TheDiamond06 said: ↑

https://bukkit.org/threads/how-to-r...ubleshoot-your-own-plugins-by-yourself.32457/
Click to expand...

I know how to read stack traces. What I'm asking is why the NPE is happening.

TheDiamond06 · Mar 31, 2016

cluter123 said: ↑

I know how to read stack traces. What I'm asking is why the NPE is happening.
Click to expand...

Well if you know how to read stack traces, why not go to the line that is having the error and debug variables there to see if one of them is null?

Dynamus · Mar 31, 2016

Can you simplify for us? Like giving line 84 of your code. meh

CodePlaysMinecraft · Apr 2, 2016

Dynamus said: ↑

Can you simplify for us? Like giving line 84 of your code. meh
Click to expand...

94*

@cluter123 Seeing how there's so many variables that could throw an NPE we need like 94 from your class "fds". (Capitalize at least the first letter of the class, it's basic OOP)

mcdorli · Apr 2, 2016

CodePlaysMinecraft said: ↑

94*

@cluter123 Seeing how there's so many variables that could throw an NPE we need like 94 from your class "fds". (Capitalize at least the first letter of the class, it's basic OOP)
Click to expand...

Capitalizing the first letter of a class is not OOP, it's just a convention.

cluter123 · Apr 3, 2016

It's fine guys. I just reloaded the config each time I saved the inventories. Seemed to fix it.

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Help with a NPE?

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