It can't contain duplicates
#help-development
waxen plinth
waxen plinth
And it can do contains in O(1)
winged anvil
that
waxen plinth
Meaning it takes the same amount of time no matter how much stuff is in there
lean gull
dumb question: how do i fix this?
} else if (arguments[1] == null) {
waxen plinth
srjlfgbflgfsbflbjgfbljgfsbl
quaint mantle
guys but 8/2 not equals 0
waxen plinth
Are you trying to check if the first argument exists
winged anvil
LMFAO
waxen plinth
So what is your point
quaint mantle
numb % == 0
waxen plinth
% is not division
winged anvil
remainder
waxen plinth
And I said num & 1 == 0
eternal oxide
@SuppressWarnings("unchecked")
List<Location> locs = (List<Location>) getConfig().getList("test");```alright
lean gull
Are you trying to check if the first argument exists
before that i have a thingie that checks if it's "create"
so no?
waxen plinth
.-.
winged anvil
what does that annotation do ?
lean gull
fix error
waxen plinth
Oh great
lean gull
remember from like a few hours ago?
waxen plinth
That really clarifies it
lean gull
the bound thing
waxen plinth
Yeah you need to check that the array has enough elements
winged anvil
lmao
quaint mantle
🧱
lean gull
what array
waxen plinth
if (arguments.length >= 2)
quaint mantle
?learnjava @everyone
undone axleBOT
Here are some links to get you started on learning Java:
- https://www.codecademy.com/learn/learn-java
- https://www.sololearn.com/learning/1068
- https://www.learnjavaonline.org/
- https://programmingbydoing.com/
- https://docs.oracle.com/javase/tutorial/java/index.html
The last one is the only official one, however some of those concepts assume that you already know a bit about programming.
waxen plinth
Can anyone asking for help please have more than 5 brain cells
lean gull
i got 2
lean gull
wait so what do i do im confusion
quaint mantle
its the fsct you didnt know how to call #contains
waxen plinth
You were iterating over an entire list to check if it contained something
lean gull
anyone help? anybody?
waxen plinth
anyone help? anybody?
?learnjava
undone axleBOT
Here are some links to get you started on learning Java:
- https://www.codecademy.com/learn/learn-java
- https://www.sololearn.com/learning/1068
- https://www.learnjavaonline.org/
- https://programmingbydoing.com/
- https://docs.oracle.com/javase/tutorial/java/index.html
The last one is the only official one, however some of those concepts assume that you already know a bit about programming.
lean gull
anybody?
quaint mantle
waxen plinth
Is there an emoji for banging your head against a wall
Oh this one's perfect
Nevermind
paper viper
Can anyone asking for help please have more than 5 brain cells
i gotchu
wait how do i
quaint mantle
how to take user input
waxen plinth
😩 🔫
eternal oxide
@lean gull java if (args.length != 2) { if (args.length < 2) player.sendMessage("Too few"); if (args.length > 2) player.sendMessage("Too many"); return; } //rest of code for two args here.
waxen plinth
Try running System.exit(100); before running System.out.println
paper viper
Wait what does dat do
quaint mantle
System.out.print("Hi");
System.out.print("Bye");
Why it on same line.
waxen plinth
System.out.print("Hi");
System.out.print("Bye");
Why it on same line.
You forgot to System.exit(100);
winged anvil
public boolean alreadyAdded(Location location) {
@SuppressWarnings("unchecked")
List<Location> locs = (List<Location>) SpawnPoints.getFile().getList("test");
return locs.contains(location);
}
```better !?!?!?!?!!?No
winged anvil
ok
waxen plinth
You should load it in as a HashSet
quaint mantle
not using a set
waxen plinth
And then check contains using that
winged anvil
thats what elgar sent me
waxen plinth
Actually for HashSet you wouldn't even need to check contains
winged anvil
ok
waxen plinth
It just can't contain duplicates
winged anvil
one moment i will google
eternal oxide
That code I sent is to load the List from config. You should be keeping the list in memory and not loading it every time
waxen plinth
Config should keep it loaded in memory
But you should still keep it loaded as a HashSet
eternal oxide
yep
quaint mantle
when an event happens it goes through the plugin code first before the game right?
chatroom
eternal oxide
when an event happens it goes through the plugin code first before the game righ...
If the event is cancellable usually yes. If not it may come after
quaint mantle
hmm, then how can i get the bee to not lose it's stinger in the EntityAttackedByEntity event since it is cancellable but i still want the bee to do damage
eternal oxide
apply the damage yourself and cancel the event
quaint mantle
hmm, ok, i'll try that, ty
Hello is there any way to check if number is usable
example:
when i type number 1 in chat i can't type it again i can use other numbers 2 , 3 ,4 etc..
the same thing when i type other number so i can't type it anymore again
is there anyway to do that
I’d say use a set to track numbers used, sets don’t allow duplicates
waxen plinth
^
winged anvil
^
thank you for the lesson on HashSets, I was previously using ArrayLists and creating methods to check if locations we're in that list, as previously seen
it has been converted
waxen plinth
Good
quaint mantle
class PlayerNumberChatHandler implements Listener {
private final Map<UUID, Set<Integer>> playerData = new HashMap<>();
@EventHandler
// if the player is registered, handle it
}
computeIfAbsent is OP here
Instead of doing playerData.get(uuid) you can do playerData.computeIfAbsent(uuid, k -> new HashSet<>())
quaint mantle
if they dont want to register them manually
waxen plinth
Yeah
crude sleet
Is there a way to move the passenger above the player head? At this point my Amorstand is in my head xD [ImageLink:] https://ibb.co/0JxjX32
If I make the armorstand big, the name is too high up, the name of the armorstand should be a little above the head
worldly ingot
```java
class PlayerNumberChatHandler implements Listener {
private final Ma...
Multimap is crying rn
paper viper
^
worldly ingot
Multimap<UUID, Integer> playerData = MultimapBuilder.hashKeys().hashSetValues().build();
quaint mantle
how do i save data in an entity? like an nbt tag or something
quaint mantle
pdc?
quaint mantle
hmm, i think i'd rather do tags
waxen plinth
Mmk
waxen plinth
addTag
getTags
Or is it addScoreboardTag
I forget
Yeah it's addScoreboardTag
And getScoreboardTags
waxen plinth
👍
waxen plinth
Player#setPlayerListHeaderFooter(String, String)
real spear
you have 2 \\
if I do one it gives an error...
"Illegal escape character in string literal" is what it says when I have 1
real spear
Tried that...
worldly ingot
In theory, that should work fine. Do you have a chat plugin by chance? Possible that it's replacing the escape character and treating it as its own escape character
(in which case you can do \\\\ to prevent that but still sloppy)
If you were to print the result of your replaceAll("(?i):shrug:", "¯\\_(ツ)_/¯") it would print out properly
For instance,
real spear
(in which case you can do `\\\\` to prevent that but still sloppy)
This worked. ty
worldly ingot
👍
torn oyster
do display names show up in death messages by default
@worldly ingot sorry for ping
do u know
quaint mantle
does anyone kno how to remove the item stats
on generated items in inventories
i.e the +4 attack etc
worldly ingot
Actually don't know, lach
hasty prawn
Are you opening it at the bottom of all that
quaint mantle
i'm scared bc i already have a few made without thinking about it but, is there a way to get a player head model with a plugin without the player having the same skin on? Since the designs still stay even when i change my skin is it saved somewhere where i can access them?
echo basalt
does anyone kno how to remove the item stats
there's one extremely hacky way of doing it
but breaks creative mode
probably
which is removing the data when sending it to the client
quaint mantle
there's one extremely hacky way of doing it
does hypixel and stuff do it
echo basalt
but that's last case
quaint mantle
or is it just one of those things u live with
echo basalt
no one knows what happens behind the scenes at hypixel
but I believe they mess with client-side lore
just because lore stuff updates when you go across lobbies
and also because adding lore to all items is pain
so they might do that too
it's quite simple to do with protocollib
quaint mantle
i'm scared bc i already have a few made without thinking about it but, is there ...
anyone know a way how to do this or is it not possible?
echo basalt
mojang texture data
use gameprofiles and whatever
and services like mineskin.org if you want to upload permanent skins
basically there's a texture id (uuid), data and signature (base64 strings)
toss them on a gameprofile and you have a skin
you can then use some hacky reflections or nms to apply it to an itemstack
quaint mantle
oh man, i don't think i understand these terms 😓 😅
echo basalt
it's like 5:15AM I can't bother explaining them either
quaint mantle
oh, well thanks for giving me an idea of where to start
echo basalt
just look into how npcs store skin or something
and then look at custom textures for skulls
should be enough
quaint mantle
alrighty, will do
rustic gale
How do I remove the block placed in BlockPlaceEvent? Setting the block to air wouldn't work cause I am checking if the block is a bed and then deleting it. since the bed is 2 blocks and I don't know the direction on which it is facing, setting 1 block to air wouldn't. work
young knoll
Why not cancel the event
rustic gale
Why not cancel the event
will that remove the block
public void onBlockPlace(BlockPlaceEvent event) {
if (event.getPlayer().getWorld().getEnvironment() == World.Environment.THE_END) {
if (String.valueOf(event.getBlock().getType()).contains("_BED")) {
event.setCancelled(true);
}
}
}
would this work?
young knoll
Yes
quaint mantle
i now have the url, but i can't use it in Skull.getCustomSkull() since it's deprecated, and i think i have to use the Material class but i only see enums there and i'm not sure where to use the url
prime reef
how memory intensive are Spigot AI methods?
prime reef
that is, let's say I switch off mob AI and use spigot methods to "simulate" AI independent of server version, as well as implement additional functionality (skill use, behavior statemachine, etc.)
setTarget is the only one I can think of offhand, yeah
damn, wish Spigot had more support for AI manipulation. using NMS is a pain.
waxen plinth
You could open a feature request
prime reef
You could open a feature request
I think the main thing with this is that I don't want to go requesting something I wouldn't contribute to lmao
and it's complex
at the same time, I do think it'd get a fair bit of use
waxen plinth
Then open a feature request
prime reef
is there a way to get a wool material
are you tying to get an itemstack of dyed wool or something?
quaint mantle
are you tying to get an itemstack of dyed wool or something?
basically i have 8 teams, but i want to make it abstract
if a teams color is red i want their wool to turn red
i want to set the itemstack when they purchase wool
prime reef
if a teams color is red i want their wool to turn red
you're using the standard ChatColor for the team, right?
prime reef
i don't think chatcolor maps directly to dye color but you could write something to map to it
quaint mantle
ye was hoping tehre was a cheekier way but thats probs it
prime reef
i mean if you REALLY wanted to
you could do something silly with names, but ChatColor only has some overlap with DyeColor
it'd be more consistent to just set it manually I think
prime reef
once you've got your dye color, just java new Wool(dyeColor).toItemStack();
prime reef
ye ofc
I think you can also do Materials
I might be a bit behind on the version
okay so I searched through the Jira to see if anyone had made similar suggestions and came to 3531
worldly ingot
You would have to map ChatColor to Material
That's something you can map manually yourself in an immutable Map and reference as necessary
prime reef
that's pretty much what I said, albeit with DyeColor rather than Material
worldly ingot
Yeah, whatever you want
prime reef
but yeah, good clarification
worldly ingot
There are ImmutableMaps from Guava, unmodifiable Maps from RT Collections, 
Make a constant
ez pz
prime reef
Or just use a regular HashMap and set it to private
worldly ingot
Well, yeah, private static and final, but as far as best practice is concerned it should also be an immutable Map
Also, the Wool class you mentioned above is pre-1.13 MaterialData which is all deprecated now
worldly ingot
So if they're working in 1.7 - 1.12 or whatever, that's the right approach
prime reef
Well, yeah, private static and final, but as far as best practice is concerned i...
just curious why this particularly matters if the end result is effectively immutable (or, I should say, unmodifiable) and only accessed through methods
unless you mean immutable keys
in which case yeah
worldly ingot
Not necessarily true. If you expect to have a map that doesn’t change it should be declared as immutable
Can use an EnumMap if you want but you can still change it privately
prime reef
should probably clarify that I despise Java, most of the work I do is in C# for game dev and the idea of having to import some library just to meet basic general best practices (not even company-specific) is infuriating
like, .NET has that shit built in
but that's entirely a personal gripe
worldly ingot
Guava is provided by Bukkit already so it’s available at runtime
prime reef
oh, is it? that's not so bad then
worldly ingot
Or Java’s SDK has an umodifiable collection/map wrapper as well
prime reef
I know a guy who shades the entirety of Hikari SQL into his plugin and uses it exactly once
It's that kind of thing that has me tearing my hair out over Java culture lmao
yeah Java has Unmodifiable versions of some of the collection classes
worldly ingot
Yeah, depends on how frequently connections are required
prime reef
using an unmodifiable collection for something that should absolutely never be modified at runtime is preferable ofc
That actually brings me to something that's been nagging at me - so with the plugin I'm writing, I want to be able to modify certain collections at runtime but return immutable copies of them for other classes to read
but the only solution i've got offhand is:
- set a flag whenever the original collection is modified (done through methods)
- when the collection is requested, regenerate the unmodifiable version if that flag is set, and return the unmodifiable version regardless
this is probably just the remainder of college brain doing microoptimizations though
the issue i was thinking of was that I didn't want to create a new immutable collection every single access lmao
worldly ingot
Nah you're fine. The GC will toss away the instances once the caller's done with them
It's not like you're allocating any more memory at all. Just a new pointer to the underlying collection is all and those get cleaned up quickly
Obviously make it immutable/unmodifiable if you can on instantiation but if you intend on changing it and just returning a copy, you're fine. No harm in that
prime reef
It's not like you're allocating any more memory at all. Just a new pointer to th...
This is what I was wondering; I wasn't sure how unmodifiables actually worked beneath the surface
if it's just a new pointer that should be good then, nice
thanks, now I can stop worrying I've written something horrific LOL
worldly ingot
Java’s inbuilt ones literally just wrap whatever collection you pass to it and delegate it’s calls
(Excluding the remove/add calls or whatever in which they throw an exception, obviously)
prime reef
alright that makes a lot more sense
Does...does Spigot only have the one developer, or is the staff page outdated lmao
worldly ingot
Just the one maintainer yes. Though lots of independent contributors
prime reef
Alright, looking into the stash rn
waxen plinth
Wait you hate java cause you thought it didn't have immutable collections?
prime reef
no, I hate java because of the culture around it
waxen plinth
What's that
prime reef
"how do I [perform single task]"
"import [8 libraries]"
prime reef
enterprise java is the single worst thing in software engineering
prime reef
really? most java developers I meet outside of Spigot have been like that
waxen plinth
I tend to use very few libraries except my own
prime reef
I'm also like that, unless it's something integral to whatever I'm writing, like I'd rather use an SQL library for something heavily focused on SQL
waxen plinth
I have my own sql wrapper
prime reef
and like I use my own library for plugin development because it streamlines a lot of the annoying boilerplate stuff
waxen plinth
I love writing my own libraries
waxen plinth
and like I use my own library for plugin development because it streamlines a lo...
Same
prime reef
i'm very glad I wrote mine lmao
it's open source but sort of bad so I don't expect anyone else to use it
waxen plinth
and like I use my own library for plugin development because it streamlines a lo...
Same
Especially commands can be super verbose and awful
prime reef
recently went and did something to build commands into a tree
waxen plinth
Mine is also FOSS if you want to check it out
prime reef
I have a feeling we've had a similar convo in the past considering we're friends on discord
waxen plinth
I don't recognize you
prime reef
yes, this is the same library I remember
you were the guy with the command annotations
waxen plinth
Hm
prime reef
unless my admittedly terrible memory is failing me again
waxen plinth
I wouldn't describe it as annotation driven
It does use annotations though
There are command frameworks built entirely on annotations
Mine is done primarily through a file in a custom format
prime reef
I took a bit of a different approach and just went through this https://github.com/Dewynion/EmberCore/blob/master/src/main/java/com/github/Dewynion/embercore/command/CommandNode.java
waxen plinth
Separates command structure from implementation
prime reef
Ah yes. github embeds. hang on.
waxen plinth
That's the most basic type of command framework I tend to see
Delegation, basically
prime reef
elaborate a bit?
waxen plinth
You still have to handle the args as a String[]
prime reef
only thing I did was write a node for a tree structure
waxen plinth
Yeah
With mine, you essentially just write and annotate a regular method taking the actual types you need
prime reef
and the sole reason for that was so I could write 800 subcommands without having to manually go and parse which argument goes where in the parent node
waxen plinth
It supports optional arguments, automatic sender and permission checks, context assertions and arguments, flags
Advanced command frameworks save a lot of time
Mine is not the only one with these features
It's mostly the way you use them that is different
I see 3 main styles
The first is yours
Simple format where you extend a command class
The second is annotation based
The third is builder based
prime reef
personal opinion is that none of those are objectively better than the others
waxen plinth
It's preference
prime reef
pretty much depends entirely on preference, yeah
waxen plinth
The first is the most limiting though
As you can't really convert arguments
I haven't seen another that works like mine, which is using a command file to determine the structure and hooking into annotated methods
But that's preference too
I just like it
prime reef
I honestly wouldn't use something like that, and that's because the plugin I'm working on has a module system where people can write their own commands
among other things
waxen plinth
Builder style is probably best suited to that
prime reef
mind explaining builder style a bit?
waxen plinth
You know the builder pattern?
prime reef
probably not, refresh my memory
waxen plinth
Cloud command framework is builder based
It's like
new SomethingBuilder().property(value).property(value)...build()
prime reef
to be fair I did sit down and hammer this out in like an hour because I needed the functionality quickly LOL
oh that
so how do people commonly extend that to commands?
waxen plinth
Not sure exactly how it works
prime reef
builder pattern is great for vectors, messaging, etc. but
waxen plinth
Take a look at cloud if you wanna know
prime reef
the only thing I'm particularly interested in is that I can specify the parent command and it automatically builds the command tree on launch
waxen plinth
I just don't like builder and annotation because they're inefficient
In terms of code I mean
Much of what you're expressing is effectively metadata
Expressing it in your code can be very verbose
Expressing it in a custom format designed for it, much less so
prime reef
that's pretty much it, yeah, and that's why pretty much everything I write is designed to cut down on the amount of code I have to write
waxen plinth
If you're ever interested in trying out my framework let me know
As far as minimizing code to implement commands goes I don't think there is a better framework
prime reef
I most likely won't, since I've already built a large plugin using mine lmao
but I may have a look to see where I can improve things
waxen plinth
Want the wiki link?
prime reef
not gonna bother explaining what mine does, there's a readme for it
already got it, dw
waxen plinth
Mmk
If you want to use your own I would recommend stepping it up
Make it convert arguments
That's the single biggest step that saves you the most grief
And it's fairly easy to add tab completion once you get there
prime reef
convert arguments as in...player names to Player instances?
waxen plinth
Tab completion is something I would never bother with when I was doing commands the old way
waxen plinth
convert arguments as in...player names to Player instances?
Exactly
prime reef
ah alright
waxen plinth
And custom conversions too
prime reef
yeah I've already got something like that for config
waxen plinth
And from there you can easily let it supply a tab completer for that type
waxen plinth
I actually just do it reflectively lmao
Do what reflectively?
prime reef
Do what reflectively?
fetch the conversion to/from ConfigurationSections
waxen plinth
My command framework is reflective, same with my config manager
Has to be when working with annotations
prime reef
y'know how you can feed in lambda functions into streams?
waxen plinth
My command manager lets you provide lambdas
Yeah
My config manager reflectively instantiates objects and populates their fields from config
My command manager only uses reflection to fetch and invoke methods
prime reef
basically when writing a converter, you either write some explicit converter bs or you just use reflection
waxen plinth
Ah yeah
With my config library you either provide a lambda to convert to and from string
prime reef
and frankly the former is a pain in the ass and nobody can read it at the end of the day unless they have their head so far into the streams API that they make lambda functions in alphabet soup
waxen plinth
Or you use a class annotated with @ConfigMappable whose fields are annotated with @ConfigValue if they have to be saved/loaded from config
waxen plinth
and frankly the former is a pain in the ass and nobody can read it at the end of...
Huh
Lambdas and streams are amazing
They're one of my favorite java features
prime reef
I enjoy them, but some of the patterns that have sprung up as a result are...irritating lmao
if you use them like a normal human being, they're great
waxen plinth
Like what
waxen plinth
Okay yeah that's ugly
prime reef
factory pattern in general is one of the worst things I've ever seen
waxen plinth
But streams are really powerful and great for reducing code
waxen plinth
Same
prime reef
Like. What benefit does it offer over just writing your code like a normal person?
Every example I see is like "you can use the factory pattern to generate shapes from a string!" or something
waxen plinth
AbstractIntegerFactoryControllerObserverStrategy
waxen plinth
👍
prime reef
You might get a kick out of https://github.com/EnterpriseQualityCoding/FizzBuzzEnterpriseEdition
prime reef
i love that they've continued to work on it and implemented spring and gradle for no reason whatsoever
@quaint mantle i see you typing smh
prime reef
i'm stuck with maven for spigot, but I use gradle when I can
quaint mantle
<@456226577798135808> i see you typing smh
oh wait sry i just pasted smt so i can send it when the chat's clearer
quaint mantle
ooh ok, soo in the EntitySpawnEvent how can i check if it was spawned with a named spawn egg?
prime reef
Why are you stuck with maven
github publish
quaint mantle
if it's possible
waxen plinth
SpawnReason maybe?
waxen plinth
github publish
What's that
quaint mantle
Hmm but that'd be an enum wouldn't it?
prime reef
What's that
basically I just push my library to a maven repo and the other plugin i'm working on automatically pulls it
waxen plinth
Hmm but that'd be an enum wouldn't it?
You could see if it was spawned by a spawn egg
Then check if it is named
prime reef
and I don't have to pay for a repo or anything, github gives you some limited hosting options
waxen plinth
basically I just push my library to a maven repo and the other plugin i'm workin...
Oh interesting
I just use jitpack
prime reef
jitpack WOULD NOT work for me. not sure why
prime reef
ooh ok, soo in the EntitySpawnEvent how can i check if it was spawned with a nam...
okay so
waxen plinth
Are you using spigot or spigot-api
quaint mantle
spigot server and plugin*
prime reef
you can certainly get the spawn reason
waxen plinth
And then check if it's named
prime reef
but I think rather than using entityspawnevent
waxen plinth
Anh are you using spigot or spigot-api
prime reef
what you should do is check for the event where the spawn egg is used instead, since there's no real way to tell from the fields in entityspawnevent
me? spigot
wait
what context?
prime reef
OH
quaint mantle
And then check if it's named
but then this would be like getting the itemDisplayName from a different object not from the spawn Reaon?
prime reef
Alright, yeah, that's why.
prime reef
There any significant difference between the two?
waxen plinth
but then this would be like getting the itemDisplayName from a different object ...
Check if the entity is named
prime reef
but then this would be like getting the itemDisplayName from a different object ...
try checking for when a spawn egg is used rather than when an entity spawns
waxen plinth
There any significant difference between the two?
Spigot has nms
Spigot-api does not
prime reef
that's gonna be it then
waxen plinth
Spigot is the entire server jar
prime reef
that's good to know actually
waxen plinth
But it only comes from your m2 cache
It's added when you run buildtools
But jitpack doesn't have that cached
So you have to use spigot-api
Either that or somehow run buildtools as part of your build
quaint mantle
mmm okay, i'll try and see if i can check with the spawn egg used and see if it's easier
prime reef
speaking of NMS, I want to absolutely gut mob AI
it's hands down the worst design i've ever seen
prime reef
are you vaguely familiar with PathfinderGoals?
prime reef
vaguely is all you need
basically, when writing entity AI in the game I'm working on, I used a finite state machine
which also worked for movement
top left corner - whole thing is managed by a state machine
very clean and nice, lets you handle behavior in specific situations
ironically one of the few times inheritance is rock-solid as well
I actually use inheritance pretty regularly but i'm old fashioned
without going on a tangent, though, pathfindergoals are basically just setting a list of goals/priorities for an entity, and they're phenomenally stupid, because they rely so heavily on inheritance that trying to use them outside of the entities they're "supposed" to be used on just flat out doesn't work
"PathfinderGoalFollowOwner" won't work if it's not an instance of EntityTameable
waxen plinth
Not follow owner
prime reef
Spigot uses interfaces to an extent (Ageable, etc.) but it can't compensate for how Minecraft itself was written lmao
I should probably sleep as well, mb
waxen plinth
Gnight
prime reef
night lmao
burnt current
Hey, quick question: If you apply different patterns to a banner, the respective patterns are displayed in the item list of the banner. Is it possible to remove this itemlore and replace it with another one?
quasi flint
What packet do i have to send, to make my npc hittable?
have been searching the wiki for some time now
packets
burnt current
so i tried with the itemstack itself and with the banner meta (respectively the variables i saved it in) and it doesn't seem to exist there
Ok too bad but thanks anyway
lean gull
can anyone help?
errpr: Caused by: java.lang.NullPointerException: Cannot invoke "org.bukkit.entity.Player.getWorld()" because "this.player1" is null
field: private Player player1;
method for getting player:
public void gamerulesGetPlayer(Player player2) {
player1 = player2;
}```
and finally, where the error comes from (there's another line simillar to this in this class):
`else if (player1.getWorld().getGameRuleValue(GameRule.ANNOUNCE_ADVANCEMENTS).equals(false)) {`no i have
it's after the method
and the method is after the field
lean gull
what is the error then
chrome wagon
I also have a error, I updated my Java to a new headless JRE for Java 16. I also updated spigot to 1.7.1 and BuildTools. My error is it doesnt start.
opal juniper
the error is, like golden stack said, you are calling methods in the wrong order most likely so it has not been defined
lean gull
what do i do then?
chrome wagon
ubuntu@ubuntu:~/minecraft$ java -jar -Xms4096M -Xmx4096M spigot-1.17.1.jar
Loading libraries, please wait...
[08:12:10] [main/INFO]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'
[08:12:13] [main/INFO]: Reloading ResourceManager: Default, bukkit
[08:12:19] [Worker-Main-4/INFO]: Loaded 7 recipes
-SKIP LINES-
[08:12:28] [main/INFO]: [STDERR]: at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:311)
[08:12:28] [main/INFO]: [STDERR]: at net.minecraft.server.Main.main(Main.java:222)
[08:12:28] [main/INFO]: [STDERR]: at org.bukkit.craftbukkit.Main.main(Main.java:206)
[08:12:28] [Thread-2/INFO]: Stopping server
[08:12:28] [Thread-2/INFO]: Saving worlds
[08:12:28] [Thread-2/INFO]: ThreadedAnvilChunkStorage: All dimensions are saved
doesn’t start at all?
ah
chrome wagon
doesn’t start at all?
I posted a snipped from my terminal. It seems to start as usual but 'crashes' within seconds
opal juniper
```c++
ubuntu@ubuntu:~/minecraft$ java -jar -Xms4096M -Xmx4096M spigot-1.17.1.ja...
there is an error there, MinecraftServer:311
maybe try rebuilding with buildtools?
lean gull
can anyone help with my issue too please?
opal juniper
can anyone help with my issue too please?
you need to do what @sinful egret said
chrome wagon
maybe try rebuilding with buildtools?
ill try it, do you know the command off the top of your noggin?
lean gull
he said to print it out when i see it
opal juniper
yep
chrome wagon
I completely look over the STDERR
lean gull
ouch
opal juniper
ill try it, do you know the command off the top of your noggin?
java -jar BuildTools.jar —rev 1.17.1
opal juniper
thanks for the help btw, appreciated.
np
lean gull
i put the get player thing before it and it still dunt work
chrome wagon
java -jar BuildTools.jar —rev 1.17.1
Oh perfect thank you. Your correct, source: https://www.spigotmc.org/wiki/buildtools/
opal juniper
Oh perfect thank you. Your correct, source: https://www.spigotmc.org/wiki/buildt...
@ me if you still have issues
opal juniper
i put the get player thing before it and it still dunt work
can you paste the whole class
?paste
undone axleBOT
chrome wagon
@ me if you still have issues
Will do, running rebuild now. <3
lean gull
no thanks, i like my code not stolen
this took me like an hour to make and it's a gamerules gui so people might actually want it
opal juniper
whatever
narrow furnace
no thanks, i like my code not stolen
no one wants your broken code LMAO
chrome wagon
LMAO
opal juniper
xD
lean gull
no one wants to be your friend LMAO
real funny
soo can anybody be helpful here or like nah
opal juniper
we want to help you
lean gull
clearly
opal juniper
and have been trying
opal juniper
buenny
lean gull
what
opal juniper
when it says that something isn’t defined
it means that you haven’t set it to anything
eg
lean gull
i have, in gamerulesGetPlayer()
chrome wagon
When in doubt print it out, just debug your code by printing player 1
opal juniper
yes but you may be calling that after the other method meaning that it errors - the jvm don’t lie
lean gull
this is the thing in the command
GamerulesGUI gui = new GamerulesGUI();
gui.gamerulesGetPlayer(player);
player.openInventory(gui.getInventory());```ok…
lean gull
what do i print
lean gull
can anyone help?
errpr: `Caused by: java.lang.NullPointerException: Cannot invok...
just scroll up man
chrome wagon
[INFO] Reactor Summary:
[INFO]
[INFO] Spigot-API 1.17.1-R0.1-SNAPSHOT .................... SUCCESS [ 35.410 s]
[INFO] Spigot-Parent dev-SNAPSHOT ......................... SUCCESS [ 0.037 s]
[INFO] Spigot 1.17.1-R0.1-SNAPSHOT ........................ SUCCESS [02:57 min]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 03:33 min
[INFO] Finished at: 2021-08-29T08:22:27Z
[INFO] ------------------------------------------------------------------------
getting closer :)
gonna try re-launching
ubuntu@ubuntu:~/minecraft$ java -jar -Xms4096M -Xmx4096M spigot-1.17.1.jar
Loading libraries, please wait...
[08:24:12] [main/INFO]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'
[08:24:15] [main/INFO]: Reloading ResourceManager: Default, bukkit
[08:24:20] [Worker-Main-4/INFO]: Loaded 7 recipes
[08:24:28] [main/INFO]: [STDERR]: java.lang.UnsatisfiedLinkError: Can't load library: /usr/lib/jvm/java-16-openjdk-arm64/lib/libawt_xawt.so
[08:24:28] [main/INFO]: [STDERR]: at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2387)
[08:24:28] [main/INFO]: [STDERR]: at java.base/java.lang.Runtime.load0(Runtime.java:746)
[08:24:28] [main/INFO]: [STDERR]: at java.base/java.lang.System.load(System.java:1857)
[08:24:28] [main/INFO]: [STDERR]: at java.base/jdk.internal.loader.NativeLibraries.load(Native Method)
[08:24:28] [main/INFO]: [STDERR]: at java.base/jdk.internal.loader.NativeLibraries$NativeLibraryImpl.open(NativeLibraries.java:383)
[08:24:28] [main/INFO]: [STDERR]: at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:227)
[08:24:28] [main/INFO]: [STDERR]: at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:169)
[08:24:28] [main/INFO]: [STDERR]: at java.base/jdk.internal.loader.NativeLibraries.findFromPaths(NativeLibraries.java:310)
[08:24:28] [main/INFO]: [STDERR]: at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:280)
[08:24:28] [main/INFO]: [STDERR]: at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:280)
[08:24:28] [main/INFO]: [STDERR]: at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2392)
[08:24:28] [main/INFO]: [STDERR]: at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:808)
[08:24:28] [main/INFO]: [STDERR]: at java.base/java.lang.System.loadLibrary(System.java:1893)
[08:24:28] [main/INFO]: [STDERR]: at java.desktop/java.awt.Toolkit$2.run(Toolkit.java:1389)
[08:24:28] [main/INFO]: [STDERR]: at java.desktop/java.awt.Toolkit$2.run(Toolkit.java:1387)
[08:24:28] [main/INFO]: [STDERR]: at java.base/java.security.AccessController.doPrivileged(AccessController.java:312)
[08:24:28] [main/INFO]: [STDERR]: at java.desktop/java.awt.Toolkit.loadLibraries(Toolkit.java:1386)
[08:24:28] [main/INFO]: [STDERR]: at java.desktop/java.awt.Toolkit.<clinit>(Toolkit.java:1419)
[08:24:28] [main/INFO]: [STDERR]: at java.desktop/java.awt.Component.<clinit>(Component.java:622)
[08:24:28] [main/INFO]: [STDERR]: at net.minecraft.server.dedicated.DedicatedServer.bh(DedicatedServer.java:524)
[08:24:28] [main/INFO]: [STDERR]: at net.minecraft.server.Main.lambda$1(Main.java:234)
[08:24:28] [main/INFO]: [STDERR]: at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:311)
[08:24:28] [main/INFO]: [STDERR]: at net.minecraft.server.Main.main(Main.java:222)
[08:24:28] [main/INFO]: [STDERR]: at org.bukkit.craftbukkit.Main.main(Main.java:206)
[08:24:28] [Thread-2/INFO]: Stopping server
[08:24:28] [Thread-2/INFO]: Saving worlds
[08:24:28] [Thread-2/INFO]: ThreadedAnvilChunkStorage: All dimensions are saved
ubuntu@ubuntu:~/minecraft$
yeah i don't think i'll be getting help anytime soon, i'll skeddadle for now
opal juniper
without more context buenny it is hard to know what the issue is
idk where you are calling getWorld to cause that error
lean gull
bro it's in the first message what do you mean
chrome wagon
what version of java do you folks use? Im getting the error with java-16-openjdk-arm64
opal juniper
```c++
ubuntu@ubuntu:~/minecraft$ java -jar -Xms4096M -Xmx4096M spigot-1.17.1.ja...
i have never seen this error
eager valley
hello
i need help
idk which is better
spigot or bungeecord
i want to make multiple servers
chrome wagon
<:monkaHmm:624377982387093527>
Background: I didnt update any of my plugins or my world
quasi flint
they are both totally sperate things
chrome wagon
would that matter?
quasi flint
u need spigot and bungeecord for a server with multiple servers to work
bungeecord is the "link" between it
eager valley
bungeecord is the "link" between it
so how do i add spigot to bungeecord?
opal juniper
Background: I didnt update any of my plugins or my world
meh try the jar as a completely new server
eager valley
https://www.spigotmc.org/wiki/bungeecord-installation/
too holy, i cant understand it
quasi flint
lemme find smth more
quasi flint
eager valley
like just a text tutorial, im too lazy to watch and my eyes are burning like hell
eager valley
ohgay
chrome wagon
meh try the jar as a completely new server
will do
opal juniper
@chrome wagon don’t bother
i asked the paper dudes
they said it’s ur java install
did you install headless?
eager valley
bungeecord is the "link" between it
so you're saying that Bungeecord is already a Spigot?
opal juniper
you need the normal one
quasi flint
so you're saying that Bungeecord is already a Spigot?
no
opal juniper
apparently
chrome wagon
im on a PI without screen so i figured headless I can do another one
do you know the name of the working one?
quasi flint
read my links please
eager valley
"manually"
quasi flint
i gave enough examples
eager valley
read my links please
where?
quasi flint
eager valley
https://www.youtube.com/watch?v=13bTgRcvyFQ
UwU
opal juniper
do you know the name of the working one?
no - you need to find it urself probably
eager valley
enough links?
too much
opal juniper
i don’t use linux xd
eager valley
enough links?
so what i was trying to say is like can i Add Spigot to Bungeecord? yes or no?
its so confusing
quasi flint
Its a standalone communication server
opal juniper
try adding —nogui to your start file
quasi flint
like a bridge
opal juniper
as the command to start the server
quasi flint
between the two servers
chrome wagon
no - you need to find it urself probably
okay after I change java I will do that :)
ty
eager valley
between the two servers
so i cant add spigot to a bungeecord?
eager valley
please read the conversation we had from start to finish
just say YES OR NO
its simple as that 🤣
quasi flint
It´s useless when u dont understand that those things do
quasi flint
so i cant add spigot to a bungeecord?
No
eager valley
No
thank you suspicious shoe, now i understand
now...one more question
how to make multiple server using spigot?
quasi flint
oh lord he comin
eager valley
Bungeecord
wtf i thought bungeecord is not a spigot
chrome beacon
It's not
quasi flint
ITS A STANDALONE SERVER
narrow furnace
why do you not read the links?
quasi flint
FOR CUMMUNICATION
narrow furnace
im confused
quasi flint
caps lock hittin different
eager valley
why do you not read the links?
cuz im LAZY
narrow furnace
have you clicked any?
eager valley
have you clicked any?
neither
quasi flint
if u want to understand yea true
chrome wagon
ubuntu@ubuntu:~$ java -version
openjdk version "16.0.1" 2021-04-20
OpenJDK Runtime Environment (build 16.0.1+9-Ubuntu-120.04)
OpenJDK 64-Bit Server VM (build 16.0.1+9-Ubuntu-120.04, mixed mode, sharing)
ubuntu@ubuntu:~$
ok gonna try again to launch
quasi flint
dont forget the -nogui arg
eager valley
well than good luck
so bungeecord.... is just like a server? not a plugin?
narrow furnace
so bungeecord.... is just like a server? not a plugin?
shut up
chrome wagon
dont forget the -nogui arg
will do, why does removing the UI help?
quasi flint
will do, why does removing the UI help?
maybe smth is broken with that
its worth a try
chrome wagon
👍
quasi flint
well but no one will help 😂
chrome beacon
oh nvm, i wont shut up. I will keep talking
At least read the pages they sent and move to #help-server
chrome wagon
Is starting :)
eager valley
At least read the pages they sent and move to <#741875845089722499>
well thank you kind man.
chrome wagon
will it auto convert the world to 1.17 or how does that work?
quasi flint
will it auto convert the world to 1.17 or how does that work?
nop
the world will convert, but not good
will probably breack a 1.16 world to 1.17
chrome wagon
I plan to just world edit remove my house and put it in a empty 1.17 world
that should fix the fuckery?!
narrow furnace
will probably breack a 1.16 world to 1.17
shouldnt this also be in #help-server
?
quasi flint
probably
chrome wagon
to be fair yes, but its kinda same thing cuz im the dev for my server and this will help me dev
lol
quasi flint
he is the server
narrow furnace
👀
eager valley
so one more question
grim ice
@narrow furnace by the way
chrome beacon
Ask in #help-server
eager valley
Bungeecord or Spigot, which is better?
eager valley
You need both
im so confused
grim ice
Do you have any java questions for me?
eager valley
Do you have any java questions for me?
no
chrome beacon
im so confused
Go to #help-server and I can explain
narrow furnace
Do you have any java questions for me?
not atm but im sure leetcode.com will
or hackerrank
chrome wagon
thank you all by the way. Seems to be working great. -nogui didnt seem to affect it either.
Def was the Java
quasi flint
good thing
chrome wagon
oh I just meant like it didnt need to be added
I didnt actually add it
my b for confusion
quasi flint
Can someone help me real quick: I use this method do decode my PacketPlayInUseEntity, works fine for the Interact, but when i try do it it for the attack, i fail mesarably, for like 2 hours now, can someone help? Method: https://pastebin.com/hVt2q0n6
chrome beacon
oh I just meant like it didnt need to be added
Yeah I know what you meant was just correcting it so it would work if you wanted it to later
chrome wagon
Yeah I know what you meant was just correcting it so it would work if you wanted...
Ya i feel that, thanks for pointing that out
chrome beacon
Can someone help me real quick: I use this method do decode my PacketPlayInUseEn...
You making NPCs?
quasi flint
yop
opal juniper
there are apis for that iirc
chrome beacon
^
opal juniper
well - read how they do it ig
quasi flint
i just need help with the attack
chrome beacon
Saves you a lot of time with code you don't have to maintain
quasi flint
well - read how they do it ig
u know an example
chrome beacon
Citizens
opal juniper
^
chrome beacon
Aight now back to speed running my Java course from school...
opal juniper
it is paid on their spigot but you can download from the jenkins
opal juniper
Aight now back to speed running my Java course from school...
lmao
what are you learning, imports?
chrome beacon
Basics
chrome beacon
I almost finished entire book in 1 day
opal juniper
but java is better
chrome beacon
Second day now
opal juniper
oh XD
grim ice
is understanding the whole oracle java tutorial still beginner level?
opal juniper
hmmm kinda
chrome beacon
oh that’s more than just the basics
I'm at the end of the book now
chrome beacon
It's teaching Swing before classes and instances...
tidal skiff
how do i check if args[0] is a valid Material?
chrome beacon
So yeah...
opal juniper
It's teaching Swing before classes and instances...
😳
chrome beacon
Everything is static atm
tidal skiff
Material.of()
example pls 👉 👈
opal juniper
uh
opal juniper
then yes
mb
Material material = Material.valueOf(args[0]);
if (material == null) return
tidal skiff
http://prntscr.com/1qqbph8 bruhhh
opal juniper
eternal night
eager valley
@quasi flint i need help again its not about the like bungeecord or spigot. dm me
tidal skiff
absolute chad
eager valley
have to do things that are more worth it
well an old man once said, if u help someone, he helps you too
idk
quasi flint
I cant think when i am getting pinged every 2 minutes
U cant fucking help with packets
tidal skiff
bruh just send the question
grim ice
@eager valley what do you need help with
eager valley
<@!832493094603718687> what do you need help with
dm
grim ice
ok dm it
eager valley
there is no "fallback_server:" and "default_server:" in config.yml
brazen surge
So I try
main: pw.main.PluginWork
main: pw.main.PluginWork.PluginWork
main: PluginWork
main: pw.main
main: src.pw.main.PluginWork
main: src.pw.main.PluginWork.PluginWork
main: .pw.main.PluginWork
brazen surge
I'm trying to run a plugin
grim ice
No one will help you with that, google it
brazen surge
I google it, but I don't search a answer
I do all like tutorial, but it don't works
lean gull
can anyone help?
errpr: `Caused by: java.lang.NullPointerException: Cannot invok...
if anyone could help with this issue that would be nice, thanks
opal sluice
if anyone could help with this issue that would be nice, thanks
It literally says what's wrong
lean gull
yes but idk how to fix it
quiet ice
gamerulesGetPlayer this is a setter method, not a getter method
Either way, are you sure that you invoked that method?
grim ice
?learnjava
undone axleBOT
Here are some links to get you started on learning Java:
- https://www.codecademy.com/learn/learn-java
- https://www.sololearn.com/learning/1068
- https://www.learnjavaonline.org/
- https://programmingbydoing.com/
- https://docs.oracle.com/javase/tutorial/java/index.html
The last one is the only official one, however some of those concepts assume that you already know a bit about programming.
quiet ice
gamerulesGetPlayer has get in it's name, which would usually indicate that it is a getter method (i. e. it should return a field), however in this case it sets a field to a value
grim ice
what's invoked and wdym setter and not getter
he means this is a mutator method not a accessor
quiet ice
And are you sure that you called gamerulesGetPlayer
quiet ice
he means this is a mutator method not a accessor
Now that is something I haven't heard about
quiet ice
I'm not dum dum
quiet ice
Mutate = modify the state of somethin
lean gull
hebrew
quiet ice
Which is why you should use get and set as those are the most abstract words in the english language
lean gull
what do i do doe
grim ice
learn java
lean gull
hush
quiet ice
Are you sure that the player is not null here?
quiet ice
learn java
This isn't a java comprehension issue
lean gull
tis not, it's the sender of the command parsed as a player
grim ice
This isn't a java comprehension issue
it is, he doesn't even know why an npe is thrown
lean gull
what's an npe
lean gull
ye idk what that is
quiet ice
Programmer jargon, we like shortening all exceptions
grim ice
if(playerthatsupposedtobenull == null) return;
quiet ice
NullPointerException = you used the null pointer at a place where you shouldn't use it.
grim ice
that will prob solve it
quiet ice
if(playerthatsupposedtobenull == null) return;
that's a geolykt fix, not something you should use
grim ice
if it stops working it means you have a logic issue
lean gull
NullPointerException = you used the `null` pointer at a place where you shouldn'...
oh then that means it's not set
quiet ice
Correct, or that you set it to a null value
lean gull
my theory was that i'm not using it in the same line
so it forgets it after one line
would that be correct?
quiet ice
Nah, where you set the field is irrelevant, as long as you do it before you use the field
lean gull
lemme test my theory 1 sec
quiet ice
Your theory is 100% wrong
And if it is right, then there is something wrong with your code
lean gull
we'll see (you're probably right)
grim ice
we'll see (you're probably right)
wdym we will see
bro
as geol said
you're 100.00% wrong
;-;
lean gull
yeah i was wrong, as expected
grim ice
fix your logic theres nothing you can do about it
unless someone goes by all your code
and checks whats wrong
lean gull
how nice and motivitional of you :p
grim ice
just send ur code ig
lean gull
please stop helping, thank you
lean gull
you're neither helping or being nice
dim bluff
hello, is there a quick way to change absolutely all the Material in my plugin to itemStack 🙂
I fucked up
lean gull
ok so i souted the player variable and it sent this CraftPlayer{name=Buenny} and now i am confused cause it should work
i mean the player variable in the command, not in the gui class
lemme try to sout it in the gui class
grim ice
hello, is there a quick way to change absolutely all the Material in my plugin t...
What??
grim ice
told you
dim bluff
well I need to change literally all my Material shit to itemStack cuz in 1.8 u cant have ENCHANTED_GOLDEN_APPLE as material....
grim ice
well I need to change literally all my Material shit to itemStack cuz in 1.8 u c...
just do it manually
dim bluff
and I've never used itemStack 🙂
grim ice
wtf
grim ice
new ItemStack(Material)
grim ice
lol
grim ice
But I don't know how to fix it and don't search anything at Internet
so uh
i have a few suggestions for you
first
learn english
its hard to learn anything from the internet if you don't know english
second, learn java
third, watch tutorials
lean gull
can anyone help? this is not sending anything to console
public void gamerulesOpenInvAndSetPlayerVariable(Player player2) {
player1 = player2;
player2.openInventory(this.getInventory());
System.out.println("banana " + player1);
System.out.println("banana2 " + player2);
}```
west berry
Sheesh lol
grim ice
can anyone help? this is not sending anything to console
```java
public void...
you just told me not to help you 
lean gull
did i ask you spesifically?
grim ice
Yes, you said 'anyone'
lean gull
so...?
grim ice
I am infact considered 'one'
lean gull
that anyone clearly doesn't include you though
lean gull
says the guy with the sh*t of an attitude
grim ice
except if it's elgar which you blocked, no one will help you without toxicity
grim ice
lmao
lean gull
well atleast i think i unblocked everyone
lean gull
ok