development

[lyric gyro]

I know dude

[merry knoll]

using the "blueprint"

[lyric gyro]

I know

[icy shadow]

honestly i barely have any idea what you're trying to with that code. do you want to make a new ArrowTrapEvent?

[lyric gyro]

blueprint is interface

nah

its not

[merry knoll]

a class is also a blueprint

[lyric gyro]

yeah

[granite hound]

im trying to call that event

[merry knoll]

and an interface is a blueprint

for classes

[lyric gyro]

man I already watched 41 java tutorials

you can expect i know how to print hello world

and make a method

[granite hound]

have you tried working with them do

[winged pebble]

an interface is a "contract" technically

[lyric gyro]

yes

[granite hound]

i did exercises after tutorials for c#

[icy shadow]

so to do that you need an event object
something like this ```java
ArrowTrapEvent event = new ArrowTrapEvent(blah);
Bukkit.getPluginManager().callEvent(event);

[lyric gyro]

where can i get exercises

[winged pebble]

c# and java really aren't that different

[merry knoll]

syntax is nearly the same

[granite hound]

yeah

[merry knoll]

naming conventions are a bit different though

[winged pebble]

Which is why I'm confused why he's having such a hard time with stuff he most definitely encountered in c#

[granite hound]

i only have some problems with some stuff so i think after i learn some more java i will be a bit better

its mostly spigot stuff

[merry knoll]

its defo not spigot stuff

[icy shadow]

theres nothing code-wise that's spigot-specific

[lyric gyro]

should I just skip threads for now?

[granite hound]

yeah i dont know either

[icy shadow]

it's not like it adds any extra syntax or ideas

[winged pebble]

yes

[merry knoll]

yes

i think you are probably at a point

[icy shadow]

yes, you shouldnt really be trying to study this until you have a very strong understanding of oop

B.A.A.S - Too many caps!
No need to shout.
Barry's Anti Abuse System | v1.4.7

[merry knoll]

where you should just write something

[lyric gyro]

so let me understand

heres the problem

if i just skip threads

[merry knoll]

tutorials help but i think programming is learned the best when you just do it

you wont need threads for 99% of use cases

[lyric gyro]

I might need them to learn the next thing in the playlist

you know

[merry knoll]

yes but if you are struggling to understand the code in the block you posted

i feel like you need to get used to the older topics first

[lyric gyro]

can you please mention an example of when ill use threads in spigot

[merry knoll]

anything that uses io

so databases, file operations

or if you want to pull something from the web

if the thing you want to do will take some time

you give that job to a worker to not freeze the server

and even then spigot itself

has some easier ways to handle multi threading

in those specific use cases

[icy shadow]

yeah using the Thread class is a bit of an antipattern in many cases

because it's usually not actually a great idea

[lyric gyro]

i think ill just drop java and develop games for kids in scratch

its easier

[icy shadow]

creating new threads for short lived tasks is very much a bad idea

[lyric gyro]

so

I don't really

really

need to learn threads

[merry knoll]

unless you need to do file operations

you dont need multi threading

[lyric gyro]

what are those

file operations

[merry knoll]

write and read from a database for example

and no config files dont really count

since they are cached

[lyric gyro]

so you need threads for writing and reading?

[winged pebble]

You don't NEED it

[merry knoll]

you dont need threads

but if you dont use them, your server needs to wait

until that operation is done

[winged pebble]

But it can help prevent slower operations from slowing the rest of your program down

[merry knoll]

meaning if it takes 1 second to read, server freezes for 1 second

[lyric gyro]

yeah

i get it

1 second of lag is bad

[icy shadow]

you do not need to know how threads actually work to do this mind you

[merry knoll]

^

[icy shadow]

in spigot it's really simple

[merry knoll]

you can use already implemented scheduler for it

you DO need to be careful to not interact with anything thats not made for concurrent use though

[icy shadow]

indeed

the best way of doing that is avoiding mutability as much as possible

[lyric gyro]

every 2 messages you send, one of them has a therm i never heard before @merry knoll

[somber gale]

Is there a way to make a function handle any exceptions?
Like that I could have something like

someMethod(SomeClass::methodThatCanThrowException);

instead of

someMethod(lambda -> {
    try {
        return SomeClass.methodThatCanThrowException(lambda);
    } catch (Exception ex) {
        return null;
    }
});

[merry knoll]

you could throw runtimeException

[icy shadow]

not trivially, you could either make a function that wraps your function, or make a new functional interface and defer the exceptions to someMethod

[lyric gyro]

why threads most of the time need to be wrapped with try and catch?

[icy shadow]

because their operations are not always safe

[merry knoll]

anything that can throw an exception needs to be wrapped in java

[icy shadow]

they can be interrupted or suspended or stopped by other parts of the program or the operating system

[icy shadow]

for example ```java
public static <A, B> Function<A, B> wrapSafely(Function<A, B> f) {
return a -> {
try {
return f.apply(a);
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
}

[merry knoll]

imho, just code something

i think thats what will make you learn the best currently

take a project and dive in

[lyric gyro]

guys i have a question

another one that is

the same dude which is teaching me java through a yt playlist also has a spigot playlist

[icy shadow]

oh dear

[lyric gyro]

should I watch both playlists at the same time

or

[icy shadow]

spigot tutorials almost always suck

[lyric gyro]

no

but its the only way to learn the api

[proud pebble]

tutorials dont teach you how to think

[merry knoll]

my man

[icy shadow]

ehh not really

[proud pebble]

just find something to make and do it

[merry knoll]

just go and start soemthing

[icy shadow]

if you're confident with java then learning the api is pretty easy

[merry knoll]

you get stuck, you google

[icy shadow]

^

[merry knoll]

repeat until you dont suck

[icy shadow]

hi dkim19375 aka kotlin = best aka hello how r u? kotlin = best btw

[lyric gyro]

should I just drop off the tutorial playlist

[dusky harness]

Hello

[lyric gyro]

and start learning things by myself?

[merry knoll]

with what you learned so far

what you need to do imho

is to just code something

[pulsar ferry]

Get stuck for a while, lose interest, give up, move to a new project, repeat until you have a folder of 50+ unfinished projects

[lyric gyro]

in spigot?

[merry knoll]

in anything

[icy shadow]

whatever

just code

[winged pebble]

^ This is the way

[merry knoll]

if spigot is what takes your interest

[lyric gyro]

System.out.println("Hello world!!")

there guys

I am a java expert now

[proud pebble]

its what i did, just find something i wanted to make and try it

[lyric gyro]

how do i make a hub world and a survival world??

[lyric gyro]

there are plugins for that

[dusky harness]

Semicolon

!!

[lyric gyro]

oh shit

[lyric gyro]

where

and what are they calle

[lyric gyro]

internet

[merry knoll]

is this a signal to switch to kotlin

[lyric gyro]

probably hub worlds, idk, but my friend uses a plugin which allows you to do that

[dusky harness]

Hehe

Multiverse

[lyric gyro]

signal to switch to python

[merry knoll]

fuck py

[dusky harness]

Ew

[lyric gyro]

LMAO

[dusky harness]

Lol

[lyric gyro]

aight

I'll just start doing what I wanted to do in spigot

but how could I

I don't know how to connect different

oh I know

extends

[icy shadow]

lol

uh

it sounds like what you want is dependency injection

you may want to just practice some OOP stuff

[merry knoll]

just start writing

[lyric gyro]

jesus that is annoying

[merry knoll]

it will get spaghetti but thats fine

[dusky harness]

What is

[icy shadow]

B.A.A.S - Too many caps!
No need to shout.
Barry's Anti Abuse System | v1.4.7

[lyric gyro]

look at him

so proud of himself

[dusky harness]

Oh imagine being able to be stopped by Barry for caps

[icy shadow]

TRUE COULDNT BE ME

[lyric gyro]

you know

this reminded me of a game that I used to play called Mindustry

[proud pebble]

god the spagetti ive written

[dusky harness]

COULDN'T BE ME EITHER_ _ _ _ _ _

Hehe

[merry knoll]

thats how you get better though

[winged pebble]

same

[icy shadow]

how

@staff

hes a hacker

[merry knoll]

write shit code - get annoyed - learn to fix - go back to step 1

[dusky harness]

Oh boy

Bm

Do u rember magicitems

[lyric gyro]

you just basically needed to mine resources with drills and use conveyor belts to lead them to your core, so you could build towers and defend yourself from a wave of enemies

[icy shadow]

uhhhh vaguely

[lyric gyro]

so you would expect that this is pretty much like coding

[icy shadow]

was that ur first plugin

[dusky harness]

Wow

Yes

How do u remeber

[proud pebble]

yep, spagetti, refactor, abandon, rewrite from scratch in a new project and repeat

[icy shadow]

im extremely clever

[lyric gyro]

sometimes the conveyor belts get 'spagghetied' and all messed up

[icy shadow]

plus it was only like a year ago

[lyric gyro]

but eventually i learnt how to play the game and didn't mess up

and I didnt watch any tutorials i just kept playing

until i got good

[merry knoll]

coding is basically that honestly

and its even better since all the issues that you can run into

has happened to someone else before

[lyric gyro]

thats how you learnt how to code

[merry knoll]

so there are solutions you can google to how to structure

[lyric gyro]

just learnt the basics of java

and started coding

?

[pulsar ferry]

It was like over 2 years ago

[icy shadow]

hmm

[merry knoll]

nah, i went to uni for it

[lyric gyro]

fuck you

[icy shadow]

oh god it was

AAAAA

[lyric gyro]

jk

[pulsar ferry]

From 2020 to 2022 we just skipped time

[icy shadow]

jesus christ

[merry knoll]

couldnt code for shit while i was learning there, got way better once i started to actually use the languages i learned

so, just start

[lyric gyro]

thats the thing

I don't know how to start

what I want to do

[merry knoll]

okay, choose a project first

[lyric gyro]

I know what I want to do

but

I just don't know the commands

sure i know the basics of java but

I don't know the spigot api

[merry knoll]

@dusky harness

how did you not get tired while writing this

[lyric gyro]

"fun"

[icy shadow]

kotlin = best

[dusky harness]

I meqn

Meqn

Mean

You can't really write that in a better way

Since u have to specify the items

[lyric gyro]

kotlin: legends create, idiots replicate

.

[winged pebble]

You could static import Material

[merry knoll]

thats not importing

[lyric gyro]

java ripoff

[dusky harness]

Eh

[icy shadow]

i would just do arrayOf(BOW, ARROW, BLAH).map(::getItem)

[dusky harness]

True

¯_(ツ)_/¯

[lyric gyro]

koltin is the ripoff language you learn to make ripoff games on android

[icy shadow]

...

[dusky harness]

?

[icy shadow]

but ofc you need some of them to have the true parameter

[dusky harness]

I can just add those

At the end

Ig

[icy shadow]

yeah but it's a bit messy

[winged pebble]

I meant to cut down on clutter

[dusky harness]

Also aki that's my rewrite

Not the one that bm knoww

Knows

[icy shadow]

you say "knows"

[merry knoll]

do we have the original somewhere

[dusky harness]

Iirc the old one is in a branch

[icy shadow]

all i remember is the name and the fact that it was not very good

[lyric gyro]

found a video called

"why 95% self taught programmers fail"

[dusky harness]

Do they sell courses

[icy shadow]

hehe

[pulsar ferry]

[lyric gyro]

its a free study manual

does it count

[dusky harness]

Hmmm

[pulsar ferry]

Most ripoff android games are made in unity lol

[lyric gyro]

and its a pdf

yeah

im sure

i'll not learn java with a pdf file

[icy shadow]

lmao

theres nothing wrong with pdf files

[dusky harness]

Video >

[pulsar ferry]

Videos are good if the person explaining is good, which for spigot most aren't
Idk about Java videos though

[lyric gyro]

well

[winged pebble]

There are some good java videos

[lyric gyro]

the playlist im watching is making java look like a piece of cake for me

the guy who made it is kody simpson btw

[merry knoll]

yeah since its easy

just make something

[lyric gyro]

i already made a few things

when I finish learning something new

I always think of how can I improve my knowledge on what I just learnt and how can I use the other things I learnt to improve it the program I made

[winged pebble]

Everytime you learn a new concept, make something that incorporates it

[lyric gyro]

like today I made a plugin that you insert a digit and the thread will starting counting from that digit to infinity

(it didnt work but i made other things that did work)

it started counting on random numbers rather then the one you inserted

[merry knoll]

yeah but make something that you would use

you will run into a lot of design issues along the way

[lyric gyro]

I love @icy shadow's Introduction to Java series

[merry knoll]

as it gets more complex

[icy shadow]

me too

it's got a great first episode

and thats it

[pulsar ferry]

Great series, only problem is that it never happened

[icy shadow]

hehe

soon tm

[lyric gyro]

yeah

I don't think I can just start making what I want on Spigot if I don't know the basics of the API

regardless of all the motivation you guys give me

So I have decided that

I'll just watch the spigot series

[icy shadow]

ok

[lyric gyro]

thats

thats it?

[winged pebble]

You could probably do a part of what you want though

[icy shadow]

pretty much

[winged pebble]

Which is a good place to start

[pulsar ferry]

You can though, if you want to figure a specific part of the api search it, or ask here

[lyric gyro]

so let me guess

I wanted to make kind of "wave plugin"

in which mobs spawn at specific locations

for you to kill them

and once you kill them

it goes to the next wave

so what I have to do is

get world i guess

thats all

[winged pebble]

I see plenty of portions that you could work on, are they custom mobs? then work on creating the mobs first

[lyric gyro]

idk how to proceed

[merry knoll]

google is your best friend

[lyric gyro]

they are custom mobs and we will be using a plugin to create those

[winged pebble]

Just pick one part of it, and think if you need to know something else to complete it

[lyric gyro]

I don't have to create them

I just have to find a way to spawn them

integrating plugins sounds like a hard thing to do mate

i dont have to worry about custom mobs for now

[pulsar ferry]

If you're using a plugin for it, the plugin should hopefully have an api to spawn them

[lyric gyro]

i just have to worry about regular mobs

[merry knoll]

okay

google how you would spawn a mob

[winged pebble]

Just pick one part

[lyric gyro]

first part

[winged pebble]

You'll go crazy trying to figure it out all at once

[lyric gyro]

the waves mechanic

there needs to have a command to enable and disable this mechanic

[merry knoll]

for a wave to happen you need to spawn mobs first

[lyric gyro]

because my friend, who created the minigame likes to control the waves

we even had an argument about this

[merry knoll]

start from a small part

[lyric gyro]

yes

hmmm

[winged pebble]

Or you need to choose random locations around the player

[lyric gyro]

they are going to spawn in set locations

like wholes

gates

etc

that stuff

holes*

not wholes lol

ok

so I need to

spawn mobs at a specific location

lets say

I actually manage to do that

whats next

[winged pebble]

How are you going to detect if the waves are done?

[lyric gyro]

well

first I need to develop the wave mechanic

when the command is activated

so we have an if statement (?)

[merry knoll]

how about you start

and actually get stuck

[lyric gyro]

google

aki teached me that

when I become one of the most respected minecraft plugin developers in the community

ill thank you all

dont worry

I kinda sounded like naruto rn

but thats just inspiration and ambition ig

naming your plugin is probably the hardest part

what is groupid and artifact id again

@merry knoll

i forgot the difference

oh wait i remember

groupid is the developer and artifact id is the name of the project

correct?

[winged pebble]

Basically

[merry knoll]

you also want to set up your package in an unique way

so it avoids clashes

[lyric gyro]

i came up with a clash before

didnt really know what it meant

[merry knoll]

convention is to use domain name for it

as in :

minecraft.net is your domain

then you name your package as

net.minecraft.projectname

[winged pebble]

I usually do io.github.deerjump

You could do me.<your name>

[merry knoll]

if you dont have a domain

^ best ways to handle it

just make sure that its unique

[dusky harness]

https://dkim19375.me 😎

[icy shadow]

Welcome to GitHub Pages
Welcome to GitHub Pages

You can use the editor on GitHub to maintain and preview the content for your website in Markdown files.

Whenever you commit to this repository, GitHub Pages will run Jekyll to rebuild the pages in your site, from the content in your Markdown files.

Markdown

Markdown is a lightweight and easy-to-use syntax for styling your writing. It includes conventions for

[merry knoll]

love how the links are broken in it as well

on a separate note

[dusky harness]

It made me make a website when I got my domain

So I just decided to use this theme

[merry knoll]

what do you guys think is the best way to sync up between servers? (for economy in this case)

[dusky harness]

(free for students btw)

[merry knoll]

database seems meh, since redis is available

[dusky harness]

Btw what's the diff between the two

[merry knoll]

redis is stored on memory

aka cached basically

so its fast but not permanent (altho it has permanent option too)

[dusky harness]

Isn't it still IO tho? Which means it should be cached in like a map

[merry knoll]

no

there is no files if you use the memory

[lyric gyro]

i'll just put one of my monickers in group id and the project name in artifact id

is that ok?

[dusky harness]

Isn't it a network call

[icy shadow]

you still have to perform a network operation to query the database lol

whether it's in memory or not

[dusky harness]

So a caching 'db' that u still have to cache

I still do not see the purpose

[merry knoll]

its a shared cache between jvms

• you dont need to deal with concurrency and race conditions

since it runs sequentially

except for pipelines but thats a bit more different

[dusky harness]

Concurrenthashmap

👍

[icy shadow]

lol

[lyric gyro]

✨ is it or not ✨

[merry knoll]

between jvms

[dusky harness]

What is example usage

[merry knoll]

caching something that will be used by multiple servers

if you want a spigot usage case

[dusky harness]

Wb code?

[dusky harness]

Monikers?

[lyric gyro]

are you trying to correct me or asking what it is

[dusky harness]

Asking

That was autocorrect

[lyric gyro]

sometimes

an artist is known by more than one name

like the caretaker

hes also known as v/vm

or his own name

[dusky harness]

if u were to make a domain

And it ended with. me

What would u make it

And it is abt u

And has ur "name"

[merry knoll]

wb?

[lyric gyro]

warner bros

[merry knoll]

ah ofc

[winged pebble]

what about

[dusky harness]

nvm

[icy shadow]

you forgot to delete your messages

[lyric gyro]

🤓

[icy shadow]

dont nerd emoji me

[lyric gyro]

use the appropriate channel please 🤓

[merry knoll]

[icy shadow]

this is the appropriate channel

i was speaking to dkim19375 aka kotlin = best aka hello how r u? kotlin = best btw

[dusky harness]

Smh Brister Mitten aka Brister Mitten19375 aka MinecraftKnightz

I would never delete my messages like that

😃

I only delete it when necessary

[icy shadow]

but you said nvm

it was necessary

[dusky harness]

I decided to see if Aki.. would never mind it

and he did indeed never mind it

so I have deemed it unneccessary

[icy shadow]

hmm

[dusky harness]

It was an experiment

[icy shadow]

i see

[cunning kraken]

Hello, i wanted to create a Material list without the eggs but a for loop to check all material names that end with egg (dont think its really efficient) didnt work it miss a lot of eggs

[icy shadow]

it's perfectly efficient as long as you only do it once

can you show your code?

[cunning kraken]

List<Material> matlist = new ArrayList<>(Arrays.asList(Material.values()));

for(int i = 0; i< matlist.size(); i++){
       if(MaterialChecker.hasEggMaterial(matlist.get(i))){
                System.out.println(matlist.get(i).name());
                matlist.remove(matlist.get(i));
            }

            return matlist;

        }

return mat.name().endsWith("EGG");

[fiery pollen]

for(Material material : Material.values())
use a foreach

[cunning kraken]

oh i hadn't thought of that, i'll try that

[icy shadow]

consider also using an EnumSet, it will provide much better performance than an ArrayList

but also use removeIf rather than removing in a loop, that'll throw ConcurrentModificationException

[marble nimbus]

(sorry 4 ping) How?

[pulsar ferry]

Packet ;p

[marble nimbus]

A little more Info, I couldn't find a Packet that fits

I know how to do it in Forge (sorta)

[dusky harness]

also note that it's possible to bypass that system

especially hack clients

[marble nimbus]

yea I know

does Fabric do it like Forge when handshaking?

because I can't find any info

[lyric gyro]

guys I made a plugin that makes the spectral arrow explosive

and it isn't working

did i mess up setting it up on the server?

[wintry grove]

ik how to get the brand

and you can probably use plugin messages to get the mods

[lyric gyro]

i wanted to create an explosion when a spectral arrow hit something

i managed to do that

except it destroys blocks

i dont want it to destroy blocks

and for some reason

my ide isnt allowing me to set only the location of the impact

power

and the two booleans which are setFire and destroyBlocks

how can I fix this

https://imgur.com/a/YPNQh1T

[marble nimbus]

Could you tell me how?

[winged pebble]

What version are you in?

[cunning kraken]

Ty

[wintry grove]

I remember seeing a packet that sent that

but I dont remember which one

probably also plugin messages

[nimble pelican]

do you know how to set a location of a player and not inform the client of the teleport

[merry knoll]

what would be the point?

you could probably do it by canceling the packets

[misty dragon]

I want to stop play from placing blocks to my gui, https://imgur.com/a/jMcLR7c

i've tried many ways but i can't

even like this

 public void onPlayerClick(InventoryClickEvent e) {
        if (e.getAction() == InventoryAction.NOTHING) {
            return;
        } else {
            if (e.getClickedInventory().getType() == InventoryType.PLAYER) {
                return;
            }
        }
        e.setCancelled(true); //i cancel the right here

        if (e.getClickedInventory().equals(plugin.quarry.quarry)) {
            for (InventoryAction a : InventoryAction.values()) {
                if (e.getAction() == a) {
                    e.setCancelled(true);
                    return;
                }
            }
        }
}

player still can place blocks to my gui

[proud pebble]

what version are you making this for? cus it feels like an older version that the method doesnt have that argument set.

cus that doesnt exist in 1.12.2 which i remember you wanted to make it for

[proud pebble]

use inventoryholder to identify your inventory, also id recommend that you just cancel the click event if its the quarry inventory, your not gunna be putting anything in the inventory right?

[misty dragon]

yes

[proud pebble]

also the forloop is kinda pointless

[misty dragon]

i just wanna cancel all the action, but they're still can place item in gui

[proud pebble]

because its nolonger the same inventory

which is why you use inventoryholder to check it

because its consistent then the content of the inventory

[misty dragon]

Ok i'll try, thank you!

[misty dragon]

i've tried like this

        if (e.getClickedInventory().getHolder().equals(Plugin.quarry.quarry.getHolder())) {
            if (e.getAction() == InventoryAction.HOTBAR_MOVE_AND_READD) {
                e.setCancelled(true);
                return;
            } else if (e.getAction() == InventoryAction.SWAP_WITH_CURSOR) {
                e.setCancelled(true);
                return;
            } else if (e.getAction() == InventoryAction.HOTBAR_SWAP) {
                e.setCancelled(true);
                return;
            } else if (e.getAction() == InventoryAction.PLACE_ALL) {
                e.setCancelled(true);
                return;
            } else if (e.getAction() == InventoryAction.PLACE_ONE) {
                e.setCancelled(true);
                return;
            } else {
                e.setCancelled(true);
                return;
            }
        }

https://giphy.com/gifs/2c9gQNsDbklaVpKSrO

should i reassign all the items in the gui?, that's kinda weird tbh

[warm steppe]

use switch

[misty dragon]

Ok i'll try, thanks!

[misty dragon]

I can't use switch to compare InventoryAction

[warm steppe]

switch (e.getAction()) {
    //...
}

[misty dragon]

yes i did just like that

[warm steppe]

Why can't you?

[misty dragon]

Ah it works, i wrote "Inventory.HOTBAR_SWAP" instead of HOTBAR_SWAP, ok im trying to use switch, thanks

[warm steppe]

np 👍

[misty dragon]

I fixed it by cancel the drag event, it was because the drag event when i trying to place block to inventory it'll stack and drag a little

[proud pebble]

ahhh i completely forgot about the drag event, it tripped me up quite a bit too

at the tine didnt know it existed

[lyric gyro]

1.12.2

[dense galleon]

Trying to update a plugin I made in 1.17 to 1.19, getting this error: error: release version 17 not supported

I tried changing my paper version in here:

    <description>MobMadness is back, better than ever.</description>
    <properties>
        <java.version>17</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>```

But that didn't do anything

[proud pebble]

the createexplosion arguments doesnt exist for that version.

but you can still do it

[somber gale]

Encounter some strange exception and I can't figure out what exactly isn't working here (See screenshot).

I have Caffeine used as a dependency in my core module and use it in this class: https://paste.helpch.at/nipucihaqi.java
The class itself is initialized inside the plugin's main class (See the onEnable() void): https://paste.helpch.at/jedeniqeyo.java
It also gets the T set there...

I do shade in the library in the core module: https://paste.helpch.at/uyerayetog.xml

[proud pebble]

https://helpch.at/docs/1.12.2/org/bukkit/World.html @lyric gyro

[lyric gyro]

i already figured a way to do it

and it worked perfectly

i just did

location.getX(), location.getY(), location.getZ()

[proud pebble]

the 3rd createexplosion method

[dense galleon]

Bump? I assumed there would be a simple solution

[lyric gyro]

isnt that a java error?

[dense galleon]

it says nothing else so idk

I haven't programmed in Spigot/Paper in ages I honestly barely remember anything

Like, how do you export your plugin to a Jar file using maven again? 😂

[sterile hinge]

mvn package

[dense galleon]

Ah right right

Moving to Gradle anyway oop

I'm trying to add Matt's Framework to my project's dependencies

https://paste.helpch.at/hilukileqe.rb here's my build.gradle

https://paste.helpch.at/diwocozejo.http thought when I refresh gradle, I get this strange error?

[dusky harness]

don't use apply plugin: in the base build.gradle

https://imperceptiblethoughts.com/shadow/getting-started/

[dense galleon]

Ah alright the wiki is 2 years old

[dusky harness]

use this method

[dense galleon]

yeah got it got it

[dusky harness]

alr

👍

[dense galleon]

https://paste.helpch.at/uzukibacen.rb Does this look right? tried adding a few dependencies to my build.gradle

Though when I launch the server, it gives an error saying java.lang.NoClassDefFoundError: me/mattstudios/mf/base/CommandBase

So I assume I did something wrong with the shadowing

[dusky harness]

implementation instead of compileOnly - implementation = shade
and make sure to relocate

[dense galleon]

yeah didn't I relocate at the bottom

I think I did it right?

[dusky harness]

oh hmm

oh are you running gradle shadowJar?

or gradle build

[dense galleon]

gradle build

[dusky harness]

u have to run gradle shadowJar

or set it up to run shadowJar after build

¯_(ツ)_/¯

[dense galleon]

Hmm is there a way to create a run configuration to execute those two

[dusky harness]

you only need to run shadowJar

since it runs build already

[dense galleon]

Ahh okay

[dark garnet]

how can i cancel player movement but not looking?

so like they cant change X, Y, or Z, but they can change yaw and pitch

[dusky harness]

you can listen to playermoveevent and if the yaw/pitch are the same, cancel the event, if they're different, teleport the player to the same location but with the new yaw/pitch (and maybe cancel the event)

[dark garnet]

why is event.getTo() nullable?

[dusky harness]

hmm not sure

[proud pebble]

apparently it can be null if you try to teleport with a portal and the world is disabled

[dark garnet]

what a strangely specific thing lmao

[proud pebble]

its what came up when i searched

[hoary scarab]

That should only be on portalteleport lol. Spigot/bukkit api is weird sometimes

[proud pebble]

well wouldnt suprise me if playermoveevent is fired at the same time as other movement events like teleport

its been opened since 1.15.2

[dark garnet]

didnt work unless im doing it wrong:

event.setCancelled(true);
if (to != null && from.getX() == to.getX() && from.getY() == to.getY() && from.getZ() == to.getZ()) {
    player.teleport(new Location(player.getWorld(), from.getX(), from.getY(), from.getZ(), to.getYaw(), to.getPitch()));
    return;
}```

[dusky harness]

if the xyz are the same, then you only need to return

you need to teleport if the yaw/pitch are not the same and the xyz are not the same

[lyric gyro]

don't do player.teleport in there

change the target location

[dark garnet]

changed it to this:

final Location from = event.getFrom();
final Location to = event.getTo();
if (to != null && from.getX() == to.getX() && from.getY() == to.getY() && from.getZ() == to.getZ()) {
    if (from.getPitch() == to.getPitch() && from.getYaw() == to.getYaw()) {
        event.setCancelled(true);
    }
    return;
}
event.setCancelled(true);```

which works

[dusky harness]

welp

[somber gale]

I found the cause but now have another issue....
The cause was that <minimizeJar> removes code it thinks is unused while it actually is used. Now I tried to apply some include filters, but this opens another issue where the main classes from my core module aren't found instead (It somehow doesn't include them....

Also, include seems to completely ignore relocations as the dependency is stored under its usual location

[dense drift]

minimize is not so great

I think I've used it once, had problems and then removed it

[broken elbow]

yeah. I haven't used minimize in a long long time

it was removing some classes that I needed bcz it looks for classes that are not used to remove them or something like that

it was weird but yeah

[lyric gyro]

        private final @NonNull EntityType type;

        private final @NonNull Location location;

        public WaveMob(@NonNull EntityType type, @NonNull Location location) {
            this.type = type;
            this.location = location;
        }

        @NonNull
        public EntityType getMobType() {
            return this.type;
        }

        @NonNull
        public Location getLocation() {
            return this.location;
        }
    }```

    private final int waveId;
    private final @NonNull List<WaveMob> waveMobs;
    private final @NotNull List<Mob> spawnMobs = new LinkedList<>();
    private boolean isStart = false;

    public Wave(int waveId, @NonNull List<WaveMob> waveMobs) {
        this.waveId = waveId;
        this.waveMobs = waveMobs;
    }

    public void spawnWave() {
        this.waveMobs.forEach((waveMob -> {
            final Location location = waveMob.getLocation();
            final World world = location.getWorld();
            if (world == null)
                throw new NullPointerException("The world is not found .");
            final EntityType mobType = waveMob.getMobType();
            final Mob entityMob = (Mob) world.spawnEntity(location, mobType);
            /*
            entityMob.setAI(false);
            entityMob.setHealth(5.0);
            entityMob.getAttribute(Attribute.GENERIC_MAX_HEALTH).setBaseValue(5);
            */
            this.spawnMobs.add(entityMob);
        }));
        this.isStart = true;
    }

    public void stopWave() {
        this.spawnMobs.forEach((Entity::remove));
        this.spawnMobs.clear();
        this.isStart = false;
    }

    public int getWaveId() {
        return this.waveId;
    }

    public @NotNull List<WaveMob> getWaveMobs() {
        return this.waveMobs;
    }

    public @NotNull List<Mob> getSpawnMobs() {
        return this.spawnMobs;
    }

    public boolean isStart() {
        return this.isStart;
    }
}```

I need someone to help me understand this code

im confused as to how it works

[dense drift]

Spawn all waveMobs with no AI and 2.5 hearts

[lyric gyro]

i want to understand this code from the begging

for some reason i cant understand

so it's creating a public class called WaveMob

with private objects

why are the objects private

why do they need to be private

[dense drift]

Thats called encapsulation, you define the fields as private and allow the outside to access them trough getters. E.g. if you have a list you can return an immutable (can not be modified) copy trough a getter

[lyric gyro]

it's encapsulation

and I know what private, public, and protected mean

I am just confused as to why do they Have to be private

is it because the plugin will try to modify them?

[dense drift]

https://www.tutorialspoint.com/java/java_encapsulation.htm

[lyric gyro]

so basically to hide from other classes?

but why?

[dense drift]

read what I sent

[lyric gyro]

my brain just isnt working today

you can add behaviour to getters and setters, such as state or parameter validation, logging, copying something etc
you can't add any of that when someone is able to access a field directly

oh

and in this case

we are doing this

right?

so that's what the text meant with total control of what is stored

so after that, its creating a public constructor and adding some getters

now lets see

can someone explain to me what is going on in the second message?

ignored 😡

[lyric gyro]

What do you think is going on?

[lyric gyro]

that's the best way to explain something to someone who doesn't understand

thank you for asking this

so

what I think is going on is

on the second part of the code

it's creating a public final class (it has to be final for some reason that i dont understand, ik what it means i just dont understand why)

and then it's creating 4 private objects

one of which is a boolean variable

and the first one is an integer

then i don't know what is going on

i can see that it creates a few methods which set the boolean isStart to false and true

[lyric gyro]

It doesn't have to be final. If its final that just means other classes can't extend it.

How long have you been learning java? While its good to look at code to get a better grasp, you should learn more about the language first so you could gauge what the code is doing

You will likely end up overwhelming yourself if you head straight into bukkit or look at plugin code

[lyric gyro]

around 1 or 2 weeks, i know enough java to code in spigot

though i dont know how to use the api

nah that's not enough java haha

Don't use an API yet

and im just really slow today

for some reason

its saturady and idk

my mind isnt working properly

[lyric gyro]

what would you consider "enough" java

Just make some cool projects with plain java. By using an API when you're still learning java you're A) writing your own software, B) using other people's software, and C) trying to understand how to turn an abstract idea into a complex web of simple instructions. It gets frustrating when you combine those three and not lock onto one or two at once

[lyric gyro]

cool?

whats cooler than a counter that uses threads to count to infinite?

like

i made so that you can input a number

and then

the console will start counting from that number to the limit of an int

which is

2 billion

isnt that cool?

That is just a for loop with extra steps haha

people in this server

just told me to leap ahead

and get involved in my first project

im doing that

learning by myself

im just confused as to what is the next step

Yes that's fine, but your project should not include a framework or API imo

[lyric gyro]

but with the advantage that i can make intervals between each number as long as i like

[lyric gyro]

thats not what people here told me

you'll see

[proud pebble]

tbh i found working with base java kinda boring cusni could never figure out what to make, i just ran through some shit and stsrted trying to make a custom anvil inventory

which i eventually did after a couple of rewrites and abandoning of the project and trying tmsomething else

[lyric gyro]

yeah

the problem of not working with an api

is that sooner or later

you will run out of ideas

a programming language without an api gets boring quickly

you will run out of stuff to do

even though

there are infinite possibilities

Where have you been learning java primarily?

[lyric gyro]

kody simpson's java tutorial playlist

just watching

observing

understanding

and doing

different from a lot of people

i try to understand what i am doing

before replicating

and then i try to improve what i just wrote

using things i learnt before

this way i learn java faster

[proud pebble]

i found that spigot tutorials were shit and never made much sense, i watched alex lee and usednw3schools alot and eventually just slowly made stuff debugged it cus inventorydragevent exists

[lyric gyro]

kody simpson's java tutorial playlist is excellent

you can watch a video while you are in the bus

or in the metro

or even in school

because they are quick and really easy to understand

im not sure about his spigot playlist though

[proud pebble]

learning java faster is kinda difficult when it can take months to years to hrasp the entire language and really understand the concept of programming. Also i found his tutorials to be bad

[lyric gyro]

why

[proud pebble]

or atleast they werent helpful to me

[lyric gyro]

alex lee's tutorial?

s

[proud pebble]

i wasnt gettingnanywherr cus i had no idea why he was doing what he was doing and was just copy and pasting his stuff

[lyric gyro]

that's why I try to understand

Have you tried reading any books about the language?

what is a 'book'

[proud pebble]

i was thinking just that

[lyric gyro]

no

where the fuck can i find a book about java

[proud pebble]

library id assume

[lyric gyro]

not something you'd find in your school library

which is like

The internet is a vast place haha

the only library in a few km radius

I'd recommend reading Head First: Java

[lyric gyro]

its just like learning math

[proud pebble]

they had a couple books on a few languages in my old colleges library

[lyric gyro]

you can just copy everything of the internet

and get an A+

but you won't really get anywhere with this

you can try and read the answer

this will get you somewhere

or you could just copy it off as it is and move on

this won't get you anywhere

get what im saying

Well yeah that's pretty much essential to learning anything

I would still recommend the book over the tutorials though. This one especially is a pretty good read and explains a lot of the fundamentals and more advanced topics without being boring like a typical programming book

Chances are you'll wind up learning a lot more than just going through videos

[proud pebble]

alex lee taught the different terms in java alot better atleast to how it was displayed on w3schools, and w3 is what i used for the rest, like variables, operators, forloops switch cases, etc

[lyric gyro]

Yeah w3 is more like a reference guide I feel like

[proud pebble]

i kinda struggled hardbtill it eventially just hit me and made sense and its gettingneasiee

[broken elbow]

I'm pretty sure someone already recommended you this, but you should try Jetbrains Academy. They have like a 3 months free trial, no credit card required. It is very common for youtube tutorials to be outdated, not very complete, etc. I've seen so many times tutorial series where from 1 episode to another or even in the same episode there are huge amounts of code just randomly showing up without any explanations or people using and recommending bad practices or using outdated stuff, etc.

[lyric gyro]

do they have a course for spigot?

[broken elbow]

Well, that's not how this works. If you learn java first, you won't need a course for spigot. All you'll need is the javadocs.

You're supposed to first get familiar with the language and then jump into using big APIs and stuff.

It's a very common mistake people do, (including myself) and most regret it in the end (including myself).

[lyric gyro]

Yeah that's what I'm sayin

[broken elbow]

well not even mistake. Sometimes its just laziness, or indifference.

And in some rare cases even stupidity.

[lyric gyro]

And I was about to get a link to jetbrains. The projects on there should keep you busy if you want something to build without overwhelming yourself with a framework

https://hyperskill.org/tracks

Once you know what you're doing with Java all you have to do is just figure out the spigot specific stuff, like event handlers, scheduling, etc, and you'd pretty much be good to go

[lyric gyro]

i feel confident with my java skill

i just dont know how to code in spigot

when I look at a java code im like

"oh i can understand this"

but when I look like at a spigot code

im like

"what"

thats my problem

[broken elbow]

Well, that should instantly tell you that your java skills are not good enough.

[lyric gyro]

from your questions and descriptions up there, you may feel confident but your knowledge is lacking

yea

what exactly

[broken elbow]

The fact that "you don't know how to code in spigot". Java is the same no matter where you code or what API you use.

[lyric gyro]

theres not much new things in java i can learn that will be useful in spigot besides improving my already existing knowledge on the things i know

[lyric gyro]

i don't know like, the commands and stuff

[proud pebble]

just learn it anyways

[lyric gyro]

From what you've described here you're not familiar with lambdas, collections, encapsulation, or any of that stuff

[broken elbow]

You don't use a different language for spigot. You use the exact same stuff as before. I know people have spent time in here before trying to help you understand the event pattern which is very common in spigot, and some other stuff but it seems like you don't really care or you just forget very easily.

[proud pebble]

the commands? what

[lyric gyro]

i dont know man

i dont know what i am supposed to do

We've already told you haha

[broken elbow]

Anyways. If you feel that confident, I recommend you start getting in the spigot API by following their simple examples at this link: https://www.spigotmc.org/wiki/spigot-plugin-development/.

If you still won't get it, then I suggest you go back to the basics and start taking it step by step.

[proud pebble]

[lyric gyro]

you told me to read a book

yep, and I recommended a book as well

[proud pebble]

we csnt exactlt hand hold you through spigot

[lyric gyro]

is it a free book?

Not legally

[broken elbow]

Well that's not a bad idea. You can get java books online for free. And usually they give you a lot of knowledge but you can also just do the free jetbrains trial and in 3 months you'll most likely be at a way higher level.

[lyric gyro]

then

I can't get it

[broken elbow]

well.

[lyric gyro]

you can if you try

[lyric gyro]

the issue is

[broken elbow]

you can get it. you just have to try hard enough 🙂

[lyric gyro]

I already know a little bit of java

and if i do this jetbrains thingy

I will be restarting

[broken elbow]

a little bit. That won't be enough. I know that when you know a bit, it is boring to go thru the starting stuff because its exactly how I was at first. But spending just that extra time helped me so much.

[lyric gyro]

it's never a bad idea to refresh your knowledge to enhance and strengthen it

i want to cry

same

[lyric gyro]

You won't be restarting anything. There's a sorta entry test at jetbrains that makes you skip parts that they think you know

[proud pebble]

same

[broken elbow]

This is a friendly advice, and I know what I'm talking about because I Went thru the same experience you go right now. You're lazy, and it's a pain to go thru a few chapters knowing most of that stuff, and sometimes you even skip stuff but I did the same and I had to just start over bcz I just used to skip over important stuff without realising

I strongly suggest you start from 0. Forget everything you know. Or most at least.

[lyric gyro]

i don't want to do that

i really don't

[lyric gyro]

I mean you are not "supposed" to do anything in particular, you are supposed to make use of the API to achieve whatever you want to do - this does not apply specifically to Spigot only, it applies to every framework you'll ever use
If it's running commands a player will send, you're supposed to make a command executor and parse the arguments to do whatever you want with them (or use a command library to do the parsing for you)
If it's taking http requests with spring framework, then you gotta learn how to use spring to respond to it, but you are not "supposed to do" anything with the request other than take whatever the request has and respond with whatever your goal is

[broken elbow]

Well, that's to your own detriment.

[lyric gyro]

You are supposed to do whatever your goal is, APIs and frameworks provide you the means for them, and it will always take time to learn those

Even if it's the JDK itself

the jdk is MASSIVE

[broken elbow]

We've gave you more than enough advice and help. From now on, don't be surprised if people will start ignoring you.

[lyric gyro]

some people say i should just start coding others say i should use things like jetbrains or even a book

i am divided

[lyric gyro]

dont talk like that

you're just making me feel sad

[lyric gyro]

If this is true, I strongly, very strongly recommend you check out the JB academy

[broken elbow]

you should code. but don't jump directly into a framework or a huge API like spigot. Do the exercises JB Academy gives you

You're just going to waste more time here if you don't start from the basics.

[lyric gyro]

jb academy has a lot of projects

idk which one will be useful

it doesn't have to be useful

its just practice really

They make you use the concepts you learn in a project so you can strengthen your knowledge

So whichever one you pick will leave you with a lot at the end of it

there are far too many ideas out there you can make something out of to practice your knowledge, enhance it and gather more

doing things on spigot is an extremely slim slice of that

it would be so great if i could just learn what i need

i just

there is no "what i need"

you need everything

don't want to forget hours watching tutorials

just start learning a bit of everything

which helped me a lot

start learning about manipulating files

start learning about JDBC and SQL

start learning about streams

[icy shadow]

streams relieved

[lyric gyro]

start learning about sockets

start learning about regex

[hushed badge]

#development message

[lyric gyro]

eventually you will use a bit of everything, there is not really "what i need" because you can use multiple tools to solve a single problem

[icy shadow]

stuck out tongue closed eyes

[lyric gyro]

trying to find the perfect tool to solve a problem you don't know if the tool will be useful is just wasting your time if you don't just give it a try

give everything a try

maybe it will be useful in the future, maybe not

but you'll recognise its usefulness when you see a problem that it might help you with

that's too much for me

i need to take a break

programming is not an easy task you can learn in a day or two

each "system", paradigm, library, anything that can be qualified as a "tool" you need to try sometime to later recognise when to use it

it's literally a toolbox

you don't have tools you don't know how to use, and you know which one of the ones you do have you can use for a certain problem

but to get more tools in there you need to try them out

even if it's in a stupid example environment with mock data

[dusty frost]

bro I do that even with vim plugins

like i slowly integrate a new motion or something into my life, things take time

[lyric gyro]

I think I'll just start to cry

and see where this leads me

that is a wonderful idea

[lyric gyro]

i have never felt so demotivated to do something in my entire life

thats how bad i feel

but i guess

all of you programmers have been there

which makes me fell atleast a little bit better with myself

but not much

[lyric gyro]

We're really just tryna help you out, not demotivate you. Truth can be harsh but you have to accept that you can't just dive in like that

[lyric gyro]

i know

should I go back to watching tutorials?

I don't want to simply forget hours of watching videos

creating variables and classes

typing out hundreds of words

simply because i couldnt understand a simple piece of code

which I would understand if it was any other day

my brain just.. just isnt working today

y'all divided me

thats the truth

[lyric gyro]

well, i can't speak for the rest but it was very demoralising in that same sense when i first started

but the more you learn, the more you realise how little you know and how much there is to learn

there are so many technologies to enjoy

[lyric gyro]

and i don't mean this in a belittling way,, though it can certainly be interpreted that way

i mean it in a sense of, there is so much to grow onto and improve

but you gotta start somewhere, and it's not gonna be on the big leagues

[lyric gyro]

but... is starting over the best option?

you can't undo what you already know

I agree that reviewing certain basics can reinforce what you already know or think you know

mmh

[lyric gyro]

maybe you are right

I should probably raise my head and do what I gotta do

and just move on

There is no way I can forget something like that

like I have watched so many videos and read so many blogs on even the same topic, not every time did I learn something new but I certainly took things from the whole

[lyric gyro]

this is what drives my motivation

knowing I can do better than where I am now

and all by using fancy libraries and enjoyable languages and frameworks

[icy shadow]

it's about drive it's about power

[lyric gyro]

it's about the family

well

but what if it's only today that i am confused

because

as I mentioned

today my brain isnt working properly

that code i sent here

had only concepts in java that i had already seen

i am mostly sure i could understand it

uh I didn't really see your issue, I came here after but yeah there are days you just can't even

[lyric gyro]

I've been coding all week

and for some reason

my brain decided to go dumb mode today

[lyric gyro]

and yeah I'm not gonna lie I feel like shit when I get like that but I just try to do something else, play a game, watch videos or documentaries, take a walk, or go full unproductive and just lie in bed and scroll on tiktok or whatever

Humans are complicated :D

i try doing that

yet my mind cant think of anything else besides

coding

well

coding is something that can just fill your mind very easily

and make you stressed

depressed even

maybe taking a break is the best option

and then seeing what I should do

[dark garnet]

if (check1) {
    blah1
    return;
}
if (check2) {
    blah2
    return;
}
return;``````java
if (check1) {
    blah1
}
if (check2) {
    blah2
}
return;```is there any difference in speed/performance? *its impossible for both `check1` and `check2` to be `true`*

[lyric gyro]

is there a difference? yes, will it like literally absolutely ever in history matter? not in the slightest

personally I would do if (check1) .. else if (check2) .., mostly for readability reasons

[pulsar ferry]

Well in this case there is a slight difference in the execution too, in the first example if check1 and check2 are true only blah1 runs
While on the second if check1 and check2(i assume you had a typo) are true then both blah1 and blah2 will run

[lyric gyro]

yeah but "impossible for both check1 and check2 to be true" then it's not really gonna be a problem, though that scenario is something I want to ensure and communicate when I read that piece of code

@lyric gyro could you explain what does the command return does

I don't know its utility lol

[lyric gyro]

basically it "exits" or "quits" the current method and returns back to the caller, if the method is not void it will give back a value as well

// return type is void, so no value is given back to the caller of this method
void foo() {
  int number = randomNumber();
  if (number >= 100) {
    // if the number is 100 or larger, it will "exit" this method
    return;
  }

  // if it's less than 100, it will continue execution
  System.out.println("Matt stinks");
}

// return type is int
int randomNumber() {
  return 36; // give back a "random" number
}

[lyric gyro]

so

it will ignore the code

if a specific condition is met?

mm i guess you can put it like that yea, it's more like "i'm done here, get back to whoever called me"

[thorny ibex]

Simple one(hopefully) - I need my Discord ID (the numerical string). But I only use Discord on mobile

How do I get it?

[lyric gyro]

344536094785667082

344536094785667082

uh if you hold on your name and scroll down it should show a "Copy ID" button I think

[lyric gyro]

it's still not clear

[lyric gyro]

you need to have dev mode on

might need to enable developer options somewhere in user settings, no clue where that's about

[thorny ibex]

I’ll look ty

[lyric gyro]

what do you mean by caller

like

the object that called the method

is that what you mean

[lyric gyro]

in this example, foo is calling randomNumber, so foo is the caller

oh

so the caller is actually the method

and its calling a variable

let me edit that a bit

[dark garnet]

wow that "matt stinks" was very unnecessary and very rude i think matt should ban u for that smh smh smh my head wowwww

[lyric gyro]

in there both foo and randomNumber are methods, foo is calling randomNumber and putting its result into the variable called number (the randomNumber method is unaware of it, it only gives back an int to the caller (foo))

[lyric gyro]

an integer can be a method?

hows this concept called

no an integer is not a method

I call the method randomNumber

it gives me an integer

i put that result in a very suitable int variable

so

uh

a method doesnt need to be void

void only means a method does not give back anything to whoever called/invoked it

if it's anything else other than void, it gives back / returns a value of that type

in the case of randomNumber(), it gives back an int value

foo(), the caller of randomNumber(), puts that value in a variable of that same type

why do java developers like to call a method before its even been declared

this just makes life harder

so the int named number

is equal to randomNumber

which returns 36

it's equal to whatever randomNumber returns, which happens to always be 36, yes

[thorny pollen]

what exactly is "ChatChat"?

[lyric gyro]

a chat plugin

[thorny pollen]

is it good? like better than essentials chat/deluxe chat

[lyric gyro]

im like that dr johnson painting by joshua reymonds

[thorny pollen]

I usually just make my own plugin for it

[lyric gyro]

it's far from being complete, very much WIP

nowadays CarbonChat is the general suggestion

[thorny pollen]

ok ty!

[lyric gyro]

@lyric gyro you may think that I am annoying but trust me

It will be even more annoying if I don't understand java

I am dumber than a bucket

and my brain just doesn't feel like working properly today

so I didn't really understand

Picture two people, Alice and Bob, Alice asks Bob if he has a sheet of paper he can give her, she will ask him that and wait patiently until he gives her any, and so he does
In the same sense that foo calls randomNumber and it gives it back an integer value