Want to add new features to WorldEdit or fix bugs yourself? You can get the game running, with WorldEdit, from the code here, without any additional outside steps, by doing the following *four* things:
1. Download WorldEdit's source code and put it somewhere. We recommend you use something called Git if you already know how to use it, but [you can also just download a .zip file](https://github.com/EngineHub/WorldEdit/archive/master.zip). (If you plan on contributing the changes, you will need to figure out Git.)
2. Install the [Java Development Kit (JDK) v8](https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html) and restart your computer for safe measure. You absolutely need version 8 of the JDK, even if you have other versions installed.
3. Open terminal / command prompt / bash and navigate to the directory where you put the source code.
🎉 That's it. 🎉 It takes a long time to actually transform WorldEdit into a mod. If it succeeds, **the Minecraft game will open and you can create a single player world with WorldEdit**.
When you make changes to the code, you have to restart the game by re-running the command for your changes to take effect. If there are errors in your Java syntax, the command will fail.
| If you get a `Type javax.tools.JavaCompiler not present` error, you need to edit your environmental variables and add a new `JAVA_HOME` variable. The value of the variable needs to be the path to where JDK 8 was installed. |
It's a little annoying have to restart the game to test your changes. The best way to reduce the time is to run the server instead (using `runServer` instead of `runClient`) and then reconnect to the server after restarting it.
WorldEdit is open source (specifically licensed under GPL v3), so note that your contributions will also be open source. The best way to submit a change is to create a fork on GitHub, put your changes there, and then create a "pull request" on our WorldEdit repository.
