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Hello, it's me again. Through this [URL='https://cloudburstmc.org/wiki/basic-to-install-nukkit-any-linux/']Basic to install Nukkit any Linux[/URL] article, you have understood how to use Nukkit on Linux

In the next article, we will install Intellij and how to convert .java file to .class

Ok we will proceed to install it now!!!

First you have to download the Intellij for Linux application

Intellij Download Link: [URL='https://www.jetbrains.com/idea/download/#section=linux']Download[/URL]

Then you have to extract the Intellij

There are 2 ways to extract Intellij file:

Method 1: Extract by right-click "Extract Here"
[URL='https://ibb.co/f0xCrqy'][IMG]https://i.ibb.co/ThgHPY7/Screenshot-20211221-125915-VNC-Viewer.png[/IMG][/URL]

Method 2: Extract using terminal
[URL='https://ibb.co/WtPLTRr'][IMG]https://i.ibb.co/ZmY0ZbQ/Screenshot-20211221-130121-VNC-Viewer.png[/IMG][/URL]
Command to Extract: [B]tar -xvzf NameFile.tar.gz[/B]

So we have successfully extracted File Intellij. Next we will install Java 11 to run Intellij.
[I]Wait !!! If installing Java 11 how to run Java 8 for Nukkit ?[/I]

Rest assured, I will show you how to run Intellij on Java 11 and Nukkit on Java 8 at the same time

Command to install Java 11 for Linux:

Ubuntu, Debian: [B]sudo apt-get install openjdk-11-jdk[/B]
CentOS, Rocky, RedHat: [B]sudo yum install java-11-openjdk[/B]
openSUSE: [B]sudo zypper install java-11-openjdk-devel[/B]
Arch: [B]sudo pacman -S jdk11-openjdk[/B]

Next, You need to set default java 8 for Nukkit

Command to set default java:

[B]sudo update-alternatives --config java
[URL='https://ibb.co/BtHxg60'][IMG]https://i.ibb.co/s2pGF18/Screenshot-20211221-131342-VNC-Viewer.png[/IMG][/URL][/B]

For example my Java 8 is 1 then I will type 1 and Enter to set Java 8 as default java

[B]sudo update-alternatives --config javac[/B]

javac does the same thing as above

Alright, next start running Intellij:

To launch Intellij, navigate to the previously extracted Intellij folder. Then click on the "bin" folder and edit the idea.sh file in the "bin" folder as follows:
[URL='https://ibb.co/sWVMXm9'][IMG]https://i.ibb.co/z640tnV/Screenshot-20211221-132437-VNC-Viewer.png[/IMG][/URL]

Add this line in idea.sh: [B]export JAVA_HOME="/usr/lib/jvm/Your Name Java 11/"[/B]
[URL='https://ibb.co/0rNqZM8'][IMG]https://i.ibb.co/BBDLjZd/Screenshot-20211221-132656-VNC-Viewer.png[/IMG][/URL]

"Your Name Java 11" Is the name of the Java 11 file on your Linux. Here is an example image:
[URL='https://ibb.co/vkR73nc'][IMG]https://i.ibb.co/VT57g4L/Screenshot-20211221-132611-VNC-Viewer.png[/IMG][/URL]

Well, you've finished installing Intellij. So let's start converting the .java file to .class 🥳

Command to launch Intellij: [B]bash idea.sh[/B]
[URL='https://ibb.co/Q708VvR'][IMG]https://i.ibb.co/kVZ3T2f/Screenshot-20211221-132745-VNC-Viewer.png[/IMG][/URL]

To be able to run maven error free. We need to install maven for Linux

Ubuntu, Debian: [B]sudo apt-get install maven[/B]
CentOS, Rocky, RedHat: [B]sudo yum install maven[/B]
openSUSE: [B]sudo zipper install maven[/B]
Arch: [B]sudo pacman -S maven[/B]

Then restart Intellij and relaunch Intellij

Now I will take the example of the Nukkit server file on github
Link Download: [URL='https://github.com/CloudburstMC/Nukkit']Download[/URL]

You download this file and unzip the file

We proceed to select the previously unzipped file
Click "Open" in Intellij, then select the file you want to Build
[URL='https://ibb.co/SKfS5MJ'][IMG]https://i.ibb.co/WcVCGMs/Screenshot-20211221-151556-VNC-Viewer.png[/IMG][/URL]

Alright, you'll be in the world of Nukkit java code. You will have to wait for the maven bar to finish loading then we will continue to the next step

After maven finished loading. They will add Java JDK 8 for File Nukkit
Here is an example image for you:
[URL='https://ibb.co/7NWz2th'][IMG]https://i.ibb.co/QjNcrv0/Screenshot-20211221-152118-VNC-Viewer.png[/IMG][/URL]

You can choose a place recommended by Intellij below. But I want to choose JDK more carefully.

[URL='https://ibb.co/VvHgqJh'][IMG]https://i.ibb.co/Q68PKpq/Screenshot-20211221-152157-VNC-Viewer.png[/IMG][/URL]

If you have JDK folder more folder than other JDK file. Then it's the JDK you should choose it. The other JDKs are paths like desktop. So I will choose the folder Java 1.8.0.312.b07

We will wait for the bar below like maven to finish loading. After it finishes loading, we will enter the command to proceed with Build .java to .class

Command to Build File.jar: [B]mvn clean package[/B]

[I]If you wonder what is mvn clean package? I will always explain to you.
"mvn" stands for maven, it will read the pom.xml file to support the Nukkit file.
"clean" is considered to clean the old build file in the directory named "target"[/I]
package is called create file.class, it will merge all file.classes in "target" directory to generate file.jar when it receives "mvn" command

As simple as you think: build + delete + create new file
 
After the Build is successful, it will show this text that you have created a file.jar
[url=https://ibb.co/WF2T774][img]https://i.ibb.co/RPD5ttk/Screenshot-20211221-152335-VNC-Viewer.png[/img][/url]

To get the file.jar, it's in the "target" folder of the folder you chose to Build
[url=https://ibb.co/5vWhLJ8][img]https://i.ibb.co/rMG2HX6/Screenshot-20211221-152409-VNC-Viewer.png[/img][/url]

Good luck. If you have difficulty. Please get in touch via the Discord Nukkit team.
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