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Required Software

  • Updated OS
  • Java
  • MariaDB (or MySQL)
  • Git

Update the OS​

wuauclt /detectnow /updatenow

Get & Install Java​

L2J is built using Java, to build you need Java JDK as well.

winget install EclipseAdoptium.Temurin.21.JDK

If you have already used winget, you can upgrade your Java version using:

winget upgrade EclipseAdoptium.Temurin.21.JDK

Check the Java version

java --version
info

We recommend updating the JAVA_HOME environment variable.

info

As long as it's possible, L2J will be compatible with the latest LTS (Long-Term-Support) version of Java, you can check the roadmap for Java SE here.

Get & Install Git​

L2J uses Git as version control system on BitBucket, use it to get the latest versions.

winget install -e --id Git.Git

Check the Git version

git --version
info

We recommend getting the source code directly from our public repositories.

Get & Install the Database Server​

Download and install a database server and create a specific user.

winget install -e --id MariaDB.Server

Execute the following SQL statements to create a L2J specific database user:

mariadb -u root -p
create_user.sql
CREATE OR REPLACE USER 'l2j'@'%' IDENTIFIED BY 'l2jserver2019';
GRANT ALL PRIVILEGES ON *.* TO 'l2j'@'%' IDENTIFIED BY 'l2jserver2019';
FLUSH PRIVILEGES;
exit
danger

We recommend changing the default database password. If you do it, you need to edit server.properties files inside the game server config folder and the login server config folder.

tip

We recommend (optionally) downloading and installing HeidiSQL or DBeaver to manage the database.

info

L2J is compatible with MySQL 8.0+, but we recommend MariaDB.