Then execute java like this: java -jar Īnd there you have it! Downloading and launching vanilla Minecraft. When you launch, simply run the substitutions on the JVM and game arguments previously mentioned.

This is necessary for some libraries like LWJGL and java-objc-bridge to work, since they have platform-specific bindings. The URL is, and the format is approximately like this: for. The version manifest is the single source of truth for what versions there are. This directory will henceforth be referred to as. However, most of the files you download / generate will be in this directory. For the official launcher this is one single directory, while in multi-instance launchers like MultiMC or HMCL, this directory can be customized according to the launcher. In any case it is a specific directory reserved for Minecraft. The working directory depends on the system. I will write about installing loaders like Fabric and Forge later on, but this is the most basic thing launchers should do.

Installing a vanilla version is the basis for everything else. Through these harrowing interesting experiences, I have gathered a lot of knowledge about how Minecraft launchers actually work from the inside.Īnd I thought it would be nice to share this information with those of you who want to work on this topic yourself, since the current documentation isn’t very complete. Recently, I’ve been playing around with writing a Minecraft launcher from scratch, and also contributing to PolyMC and ManyMC.

Minecraft java download launcher