Getting started

Three short chapters. By the end you have a working japes world in a fresh Gradle project and understand the minimum shape every program follows.

Installation

Gradle dependency from GitHub Packages, JDK 26 toolchain, --enable-preview flags, and authentication for the snapshot feed.

Quick start

A complete 40-line example: two components, one system, one tick loop. Runnable as-is.

Project layout

How the repo is organised (ecs-core vs benchmarks), where the tutorials point into the source, and which modules consumers should depend on.

Once you're comfortable with the quick start, head into the Tutorials for a 22-chapter walkthrough of every feature, or jump straight to the Benchmarks if you want to know what the numbers look like first.