** New ones are increasing due to various mods **

Some people may find it difficult to make a game ... **, but in reality, creating a mod is "introducing something that works on the game", so we don't make a game * * It's not as difficult as you think **. I think it's important to touch it first without being prepared. Also, in this article, I will try to write gently for beginners (please feel free to ask questions if you have any questions!).

The goal is to create a tutorial mod for the first time from 0 and actually introduce it to Minecraft. The goal is to be able to see what to do for the mod you want to make when you're done.

Finally, before moving on to the explanation, I would like to mention a few important points. First of all, when working on Modding from now on, ** Be sure to check your development environment and the version of Minecraft itself and Minecraft Forge (described later) of the site you refer to **. Different versions have (sometimes significantly) different implementations. Unfortunately, all I can share here is the knowledge of modding in one not-so-new version. Unless you have a clear goal, we recommend this because adapting to the environment in this article will avoid unnecessary troubles. Secondly, I'm sorry to remove the ladder, but unfortunately, the current situation ** Minecraft's modding reference materials are far from complete **. Especially ** There is almost no Japanese material **. Therefore, it may be difficult to find what you want to know. I will write tips for such cases in another article, but since problem-solving ability is also an engineer's background, please do your best. And hopefully (including this article) ** Please keep a record of your findings! ** Even if you treat the same thing, it's worth reprinting in your own words. It will help someone someday. And thirdly, I am a beginner in Java, so please understand that it may be inaccurate in terms of language.

The introduction has become long, but let's start modding from the next section!

Environment

environment

First, let's prepare a development environment. This article uses the following versions of the tools.

Each one uses a fairly old version, including the version of Minecraft, because it was done in the same environment as the reference article. You can use a newer version if you need to (if you're confident), but you'll have to deal with compatibility issues yourself. Also, please read the article on the assumption that some or all of the following descriptions do not apply.

JDK (Java Development Kit) Minecraft (Java edition) runs on Java, so you need a Java development environment. After agreeing to the terms, download from here. (It's quite down)

However, you need ** Oracle profile (account) ** to download, so if you don't have it (or maybe not), create one. ~~ Men d ~~ When registering, you will be asked to enter the company name and department, but if you are a student, you can use "student" for the department / job title, the school name for the company name, and the school address for the address.

Execute the downloaded exe to install it.

InteliJ IDEA Next, get the integrated development environment. After agreeing to the terms, download from here.

Execute the downloaded exe to install it. I can't get a detailed screen because it's a hassle to install again (sorry), but basically nothing needs to be changed. The initial setting screen will appear at the first startup, but this is also appropriate and okay. You may want to turn off the provision of data for improving functions.

Also, since the language is English by default, let's translate it into Japanese if necessary (→ Reference article). After that, I will proceed with the story as it has been translated into Japanese.

Minecraft Forge MDK Finally, get the Minecraft Forge Development Kit, the de facto standard prerequisite mod in the Minecraft mod neighborhood. Forge is an API that comprehensively provides various functions used when developing and introducing mods. After agreeing to the terms, download from here. I think it's okay (or better) to be Recommended, but as mentioned above, I'll match the version to the reference article. Click Show all Versions at the bottom to expand it. Download the relevant Mdk. Extract the downloaded Zip file.

Create a project folder anywhere (for example, D: \ projects \ mc_example_mod, then replace the path as needed). Copy the following items from the Forge folder you just extracted to the project folder. (You can copy or rename the expanded folder and use it as it is. Here, README etc. are excluded.)

D:\projects\mc_example_mod
　├ build.gradle
　├ gradlew
　├ gradlew.bat
　├ gradle
　│　└ wrapper
　│　　　└ gradle-wrapper.jar
　│　　　└ gradle-wrapper.properties
　└ src
　 　└ main
　 　　　├ java
　 　　　│  └ com
　 　　　│     └ example
　 　　　│        └ examplemod
　 　　　│           └ ExampleMod.java
　 　　　└ resources
　 　　　   ├ META-INF
　 　　　   │   └ mods.toml
　 　　　   └ pack.mcmeta

Execution configuration

Create an execution configuration for IntelliJ IDEA. Start PowerShell, change to the project directory and execute the following command.

PS D:\projects\mc_example_mod> .\gradlew genIntellijRuns

When BUILD SUCCESS FUL is displayed, the process is complete. It will take some time, so be patient.

Gradle project import

Start Intel iJ and click "Open" to open the project directory. You will be prompted to "Import Gradle project" in the pop-up notification at the bottom right or the event log at the bottom, so click on it.