Running cmd commands

[grand warren]

so my code doesnt work

public class Main {
    public static void main(String[] args) {
        String[] command = { "ls" };
        var r = Runtime.getRuntime();
        r.exec(command);
    }
}```
errors: ```
DiscordBot.java:5: error: unreported exception IOException; must be caught or declared to be thrown
        r.exec(command);
              ^
1 error
error: compilation failed```

[gritty hatch]

Detected code, here are some useful tools:

Formatted code

public class Main {
  public static void main(String[] args) {
    String[] command = {
      "ls"};
    var r = Runtime.getRuntime();
    r.exec(command);
  }
}

<@&987246883653156906> please have a look, thanks.

[rancid atlas]

yes, add a throws clause on main
If you have an IDE, it should do this automatically

[grand warren]

huh

im new to java

[rancid atlas]

public static void main(String[] args) throws IOException {...

@grand warren

[grand warren]

ty

    public static void main(String[] args) throws IOException {
                                                  ^
  symbol:   class IOException
  location: class Main
1 error
error: compilation failed```

[gritty hatch]

Detected code, here are some useful tools:

Formatted code

DiscordBot.java : 2 : error : cannot find symbolpublic static void main(String[] args) throws IOException {
   ^ symbol : class IOException location : class Main1error error : compilation failed

[grand warren]

@rancid atlas

[rancid atlas]

you have to import it

[grand warren]

how.....

[rancid atlas]

at the top

import java.io.IOException;

@grand warren

and please use an IDE

don't do it manually

[grand warren]

huh

idk

[rancid atlas]

?

[grand warren]

wdym

[rancid atlas]

What are you using currently ?
VSCode ?

[grand warren]

ye

[rancid atlas]

Either install the full extension pack of java for vscode

or better, install IntelliJ

but don't that manually please

[grand warren]

im installing the java extention

[rancid atlas]

You have to install the full extension pack

not just one of the extension

and IntelliJ is far better

[grand warren]

i cant find it

but i got the full java pack

dw

[rancid atlas]

find what ?

[grand warren]

intellij

[rancid atlas]

https://www.jetbrains.com/fr-fr/idea/download/?section=windows
scroll down to the black part

[grand warren]

it doesnt output anything

[rancid atlas]

Well yes

[grand warren]

oh ye

[rancid atlas]

you just asked to run ipconfig

but you didn't get the inputstream to read it

[grand warren]

ok thanks!

do yk how to turn this into a .jar file

do i just rename it

@rancid atlas

[rancid atlas]

new ProcessBuilder("ipconfig")
  .redirectIO()
  .start();

Try this

[grand warren]

?

i dont need to see the output

[rancid atlas]

you have to compile it with javac command, then create the jar with jar command
...or use an ide

[rancid atlas]

what did you do ?

[grand warren]

?

i just need to run a python file for a mc server

cuz im better at python

[rancid atlas]

but why are you using java then ?

and why ipconfig ?

[grand warren]

for testing

ipconfig is for testing

[rancid atlas]

right

and why are you using java if you are better at python ?

[grand warren]

cuz

[rancid atlas]

my question is, what are you trying to do that require java ?

[grand warren]

i need to run a python program for a mcserver

[rancid atlas]

ah

[grand warren]

also

[rancid atlas]

then try this

[grand warren]

how do i make folders

[rancid atlas]

Files.createDirectories(Path.of("myfolder"))

[grand warren]

and check if folders exist

[rancid atlas]

Files.isDirectory(Path.of("myfolder"))

@grand warren also, which version of java are you using ? And which version of mc ?

[grand warren]

sorry @rancid atlas i went out with a friend

how do i change directory?

[rancid atlas]

Change directory ?

this isn't cmd

[grand warren]

dw

[rancid atlas]

and can you answer those questions please ?

[rancid atlas]

?

[grand warren]

java 20 and mc 1.20

[rancid atlas]

right

[grand warren]

ye i just need to make a folder with all the python files then execute the whole folder

[rancid atlas]

Then what's the problem ?

[rancid atlas]

this creates a folder

[rancid atlas]

then use this do execute whatever

[grand warren]

bad

[rancid atlas]

Import them

import java.nio.file.*

if you have the java extension pack of vscode, it should auto import them

[grand warren]

tysm

[rancid atlas]

click the hint

[grand warren]

finally

[rancid atlas]

also, please don't try to do that manually, use the extension pack

or inetllij

[grand warren]

can i execute all of the files in a folder

[shy tide]

Why not use IntelliJ which is free? It'll help you with all that.

[rancid atlas]

wdym

[grand warren]

so like run all of the files in the specified folder

[rancid atlas]

individualy ?

files of what ?

python ?

[grand warren]

python files

[rancid atlas]

do a loop

[grand warren]

..

idk how

[shy tide]

It's easier to look up a guide.

But the basic premise is:

for (int i = 0; i < 10; i++) {
  System.out.println(i);
}

[grand warren]

i find it easier to get actual people to helo

help*

[shy tide]

We do suggest looking up the basics.

[grand warren]

: (

[rancid atlas]

for(Path pyFile : Files.list(Path.of("myfolder")).filter(p -> p.endsWith(".py")).toList()) {
  ...
}

[grand warren]

ok ty

[rancid atlas]

The problem here is that he doesn't know java and doesn't want to use it, and use python instead
But since he is trying to use a minecraft server, he needs at least java in order to call python files that he coded

[grand warren]

precicely

: D

[rancid atlas]

In any other cases, yes I would say just learn java properly

[grand warren]

so is this correct

[rancid atlas]

please use this @grand warren

[rancid atlas]

and why is there nothing in the if ?

[grand warren]

oops

1 mo

[rancid atlas]

also the extension pack isn't active here otherwise some parts should be red

[rancid atlas]

?

[rancid atlas]

also pretty sure you don't want to search in myfolder

[grand warren]

i think i got it

@rancid atlas

[rancid atlas]

...why do you copy the whole code twice

and please read my other messages

[grand warren]

i did?

[rancid atlas]

.

[rancid atlas]

.

[rancid atlas]

.

[rancid atlas]

no ↑

[grand warren]

i did

[rancid atlas]

ah yes my bad

for the first one

but not the other

[grand warren]

?

[rancid atlas]

Also

[grand warren]

wdym both

[rancid atlas]

You are using "myfolder"

and you are copy pasting the code twice

your if is pointless

[grand warren]

ok?

[rancid atlas]

paste the code here please

[shy tide]

They do create the directory first. But that seems a bit special, since then there would be no python files.

[rancid atlas]

I mean, the code is copy pasted twice

and the if is useless

[grand warren]

so...

[rancid atlas]

paste the code here please

[shy tide]

I just meant there was a slight difference. But indeed, the duplication is useless.

[grand warren]

import java.nio.file.*;

public class Main {
    public static void main(String[] args) throws IOException {
        if (Files.isDirectory(Path.of("PyServer"))) {
            for(Path pyFile : Files.list(Path.of("PyServer")).filter(p -> p.endsWith(".py")).toList()) {
                new ProcessBuilder("python" + pyFile)
                .redirectIO()
                .start();
              }
        }
        else {
            Files.createDirectories(Path.of("PyServer"));
            }
        }
    
}```

[gritty hatch]

Detected code, here are some useful tools:

Formatted code

import java.io.IOException;
import java.nio.file. * ;

public class Main {
  public static void main(String[] args) throws IOException {
    if (Files.isDirectory(Path.of("PyServer"))) {
      for (Path pyFile : Files.list(Path.of("PyServer")).filter(p -> p.endsWith(".py")).toList()) {
        new ProcessBuilder("python" + pyFile).redirectIO().start();
      }
    }
    else {
      Files.createDirectories(Path.of("PyServer"));
    }
  }
}

[rancid atlas]

wait no

[grand warren]

?

[rancid atlas]

import java.io.IOException;
import java.nio.file.*;

public class Main {
    public static void main(String[] args) throws IOException {
        Files.createDirectories(Path.of("PyServer"));
        for(Path pyFile : Files.list(Path.of("PyServer")).filter(p -> p.endsWith(".py")).toList()) {
            new ProcessBuilder("python", pyFile)
              .redirectIO()
              .start();
        }
    }
}

@grand warren

try this

[grand warren]

bad

[rancid atlas]

ah yes

but first

please make the java extension pack working

or use intellij

and stop using cmd

@grand warren

[grand warren]

k

[rancid atlas]

this error should appear in red directly in vsc

@grand warren

[grand warren]

downloading intellij

[rancid atlas]

import java.io.IOException;
import java.nio.file.*;

public class Main {
    public static void main(String[] args) throws IOException {
        Files.createDirectories(Path.of("PyServer"));
        for(Path pyFile : Files.list(Path.of("PyServer")).filter(p -> p.endsWith(".py")).toList()) {
            new ProcessBuilder("python", pyFile.toString())
              .redirectIO()
              .start();
        }
    }
}

@grand warren
Should work

[rancid atlas]

this code above shouldn't cause such error

[grand warren]

im installing intellij rn

[rancid atlas]

right

[grand warren]

gotta reboot

wait i gotta pay for intelliji

[rancid atlas]

no

there are two version

a paid one and a free one

on their website

scroll down

[grand warren]

bruh

[rancid atlas]

yes

that's the ultimate version aka paid

download the free one

[grand warren]

ah...

[rancid atlas]

https://www.jetbrains.com/fr-fr/idea/download/

scroll down

[grand warren]

ye i found it..

i got it

so do i just copy and paste the code @rancid atlas ?

[rancid atlas]

create a java project

it should generate a main class and main method

[grand warren]

i got it up

[rancid atlas]

hmm

show the file tree at the left please

[shy tide]

Click top right in the yellow bar to point it at the JDK you've installed.

[rancid atlas]

no the file tree

[grand warren]

where?

[rancid atlas]

There should be something like that at the left

no

[grand warren]

oh its just 1 file

[rancid atlas]

that's an image I took from the internet

[rancid atlas]

create a java project please

[rancid atlas]

right

see

now you have one error

it is red

[grand warren]

wow

ok!

[rancid atlas]

so to fix this

use pyFile.toString() instead

[grand warren]

kk

[rancid atlas]

take a screenshot again

[rancid atlas]

what does the error say ?

[grand warren]

java: cannot find symbol
symbol: method redirectIO()
location: class java.lang.ProcessBuilder

[rancid atlas]

hmm

ah my bad

it's
inheritIO()

not redirectIO()

@grand warren

[grand warren]

we all make mistakes 🙂

[rancid atlas]

are there any error now ?

[grand warren]

no red...

[rancid atlas]

right so

just a few tips

about intellij

[grand warren]

yaa

[rancid atlas]

if you start to write anything, it will try to autocomplete

[grand warren]

k

[rancid atlas]

if you try to write something.fo

it will try ti find all the method that can be called

it will try to autocomplete too

[grand warren]

oki 🙂

[rancid atlas]

and note that you can press alt+enter on pretty much anything to get some auto code change

like for example, you have a class you want to import

just press alt+enter on it

then select import

and finally

you can check the doc of everything by pressing ctrl+q on anything

@grand warren try it

[grand warren]

nrn

im testing the code

[rancid atlas]

right

so

@grand warren click on any of the green arrow to run the code

[grand warren]

k

ummmm

[rancid atlas]

?

[grand warren]

hold up

[rancid atlas]

well

[grand warren]

it doesnt run the files

[rancid atlas]

there are probably nothing in the PyServer folder you just created lol

[grand warren]

no i made 2

that make a dir

to show it works

but it doesnt run the files

[rancid atlas]

do a screenshot of the file tree in intellij

[grand warren]

it makes it in the wrong place

[north saffron]

these files look like text files

maybe the files are idk.py.txt

[rancid atlas]

nah, intellij would show them

[rancid atlas]

wdym

[north saffron]

well intellij would also show a proper symbol for python files

[rancid atlas]

hmm

[rancid atlas]

so what do you mean ?

[grand warren]

its just intellej

both of then

them*

say

or smt like that

[rancid atlas]

?

[rancid atlas]

this is the correct place here

[grand warren]

yes

[rancid atlas]

so what's the problem ?

[grand warren]

there not running

[rancid atlas]

in the java code

do you enter the loop ?

I mean

does it find any file ?

can you place a println in the loop

[grand warren]

idk

[rancid atlas]

note that sout will autocomplete into System.out.println in IntelliJ @grand warren

so try to place a println in the loop

and print the path

[grand warren]

nuthin was found

[rancid atlas]

wdym

no print ?

[grand warren]

ye

no print

[rancid atlas]

then do

System.out.println(Path.of("PyServer").toAbsolutePath());
outside the loop, does it corectly match the folder @grand warren ?

[grand warren]

yes

[rancid atlas]

what if you temporary remove the .filter(...) ? does it find things ?

[grand warren]

yes

[rancid atlas]

ah, what does it find ?

[grand warren]

it just says file found!

thats what i set it as

[rancid atlas]

ah, make it so it prints pyFile instead

what does it show ?

[grand warren]

wait it just executed

[rancid atlas]

???

[grand warren]

omg it works!

[rancid atlas]

wtf

[grand warren]

ooh!

it found the files

so it ran them!

[grand warren]

@rancid atlas , ive just made it a jar file,but when i run my server, it doesnt make the folder

[shy tide]

Any errors? Did it crash? Are the rights set correctly?

[grand warren]

ik what i did wrong

@rancid atlas ive made it a mc plugin, but now its buggy

[rancid atlas]

well yes, you can't just throws here

you have to try catch

so remove the throws

alt+enter -> try catch the whole block

[grand warren]

i asked chatgbt

import org.bukkit.plugin.java.JavaPlugin;

import java.io.IOException;
import java.nio.file.*;

public final class PyserverPlugin extends JavaPlugin {

    @Override
    public void onEnable() {
        System.out.println("[PyServer] Loading PyServer...");
        try {
            Files.createDirectories(Paths.get("PyServer"));
            System.out.println("[PyServer] Located files:");
            Files.list(Paths.get("PyServer")).forEach(pyFile -> {
                System.out.println(pyFile.toString());
                try {
                    new ProcessBuilder("python", pyFile.toString())
                            .inheritIO()
                            .start();
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            });
        } catch (IOException e) {
            System.out.println("Error creating directory or listing files: " + e.getMessage());
            e.printStackTrace();
        }
    }

    @Override
    public void onDisable() {
        // Plugin shutdown logic
    }
}```

the plugin doesnt even appear

@rancid atlas

[rancid atlas]

is there any error ?

[grand warren]

no when i execute it, it just makes a jar file

[rancid atlas]

wdym

you are saying that this code creates a jar file ???

[grand warren]

well it runs another file

its weird

@rancid atlas I found the errors

[rancid atlas]

show the pom

[grand warren]

https://srcb.in/Zi83z45XNw

das pom.xml

[rancid atlas]

how did you run it ?

also, does it work from intellij?

[grand warren]

ye

i clicked run

but it ran the pom

idk why

but when i made it a .jar file it just

didnt appear

[rancid atlas]

what didn't appear

[grand warren]

idk

[rancid atlas]

please be more precise with your explanation

each time I have to decode them

[grand warren]

maybe cuz of these errors

[rancid atlas]

but what did you do ?

did you run the jar manually ?

[grand warren]

when i ran /plugins in minecraft, the plugins didn't appear

no i put the .jar file into the plugins folder

[rancid atlas]

ah

[rancid atlas]

and where did those errors pop up ?

[grand warren]

cmd

i got the errors from cmd

[rancid atlas]

from the server ?

[grand warren]

no

java Pyserver.java

in cmd

[rancid atlas]

well yes

[grand warren]

ok lemme try smt

[rancid atlas]

wait a minute how is that related

[rancid atlas]

how is runing PyServer related to the JavaPlugin?

[grand warren]

i gtg, ill try again tmrw

[grand warren]

Hey @rancid atlas thanks for all the help with this! The plugin works now I'm just gonna make a command that lists all of the files and it will be done, tysm for all your help : D