# GraphQL Java: the JVM implementation other GraphQL servers are built on > A mature Java implementation of the GraphQL specification that several JVM frameworks wrap, published to Maven Central under a group id that predates the current generation of tooling. **graphql-java/graphql-java** — GraphQL Java implementation - Repository: https://github.com/graphql-java/graphql-java - Website: https://graphql-java.com - Stars: 6,221 · Forks: 1,143 - Language: Java - License: MIT - Published: 2026-10-06 · Updated: 2026-10-06 · Language: en - Canonical page: https://hysenlabs.com/projects/graphql-java-graphql-java ## The repository is a pointer, not a manual The README is unusually short for a project of this size, and that is the honest first observation. It identifies the project as a Java implementation of the GraphQL specification, links to the specification repository, links to the discussion forum, and then points at four things: a beginner tutorial for Spring Boot, the documentation site, a book, and the releases list. There are no installation steps in the README, no dependency snippet, no configuration example and no code. For a server implementation that is the right call, because how you pull the artefact in depends on your build tool and how you wire the HTTP layer depends on your framework. The README names Maven Central as the place to find the latest build, with the coordinates in the URL path. What that means for a reader is that the repository answers the question of what this is and who maintains it, and defers every operational question to graphql-java.com. There is no getting started path in the repository itself, so if you are evaluating this library you will be reading an external site regardless of how the repository looks. ## Two versions released on one day tells you about the branch layout The release list on the repository is short and worth reading carefully. Three tags appear: v25.1, v24.4 and v26.1, and all three carry a publication date of 2026-08-24. Two adjacent major versions shipping on the same afternoon is not a typo in a small way, it reflects a project that maintains parallel release lines and publishes them together. That structure has a practical consequence for adoption. When you pick a version you are picking a line, and the lines move at their own pace. The 26.x line exists for teams willing to take newer behaviour, the 25.x line is the current middle, and 24.x is what a cautious upgrade path stays on. The README sends you to the releases list specifically to learn about new releases and the changelog, which is where the differences between those lines would be described. The default branch is `master` rather than `main`, and the repository carries a `gradle/` directory, `gradlew`, `build.gradle` and `settings.gradle`, which is what you would expect from a JVM project built with Gradle. There is also `test-baseline.json` at the root, a `security/` directory, `coding-guidelines.md` and `additionallicenses/`. The last of those is worth a note: a library that carries an additional licences directory is tracking dependencies whose terms differ from its own MIT licence, which is a sign of a project that takes distribution seriously. ## Where GraphQL Java stops and the frameworks begin The most useful sentence in the README for anyone choosing a stack is the one about federation, and it is precise about ownership. GraphQL Java is described as the foundation for building GraphQL services on the JVM. For teams adopting GraphQL Federation, a separate project named feddi is described as the first JVM native federation gateway and platform built on GraphQL Java, implementing the GraphQL Composite Schemas Specification. The relationship is stated directly rather than implied: the open source gateway runs as a standalone federation gateway inside existing Java and Spring GraphQL environments, and feddi is developed independently from GraphQL Java. That distinction is the thing to hold onto. GraphQL Java is the execution and schema layer. Federation, the ability to compose a graph across services that do not know about each other, lives in a different project on top of it. The other end of the spectrum is Spring. The README's first documentation link is a getting started tutorial for GraphQL Java with Spring Boot, which tells you where the majority of readers end up. Spring for GraphQL is the framework layer, GraphQL Java is the engine under it, and if you are on the JVM the realistic question is not whether to use GraphQL Java but whether to reach it through Spring for GraphQL or wire it into an existing servlet or reactive stack yourself. ## A book, a licence and what the repository does not say Two supporting signals are worth noting. First, the maintainers have written a book, GraphQL with Java and Spring, described as covering what is needed to build a production ready GraphQL service, sold through Leanpub and Amazon. A project that publishes a book tends to be a project that expects to be used in production rather than evaluated and abandoned, and the book's framing matches the README's own: GraphQL Java plus Spring, in that order. Second, the licence. The README states MIT, with copyright held by Andreas Marek and contributors, and the repository has a `LICENSE.md` alongside a `SECURITY.md` and a `CODE_OF_CONDUCT.md`. The security policy and the code of conduct both being first class files in the tree is a small but real signal about how the project is run. What the repository does not say is as significant. There is no performance claim, no benchmark figure and no compatibility matrix for HTTP servers, servlet containers or reactive stacks. There is a `performance-results-page/` and `performance-results/` directory in the tree, so the subject is addressed somewhere, but not in the README and not in a form you can evaluate without leaving the repository. The repository also has no `examples/` directory in the tree, which for a server library means the examples live on the documentation site. ## How to judge it without installing it The realistic evaluation path for this project is short, and it is mostly about your own stack rather than about reading code. Decide whether you are going through Spring for GraphQL or wiring the engine yourself, because that choice determines which documentation you read and how much of the configuration you own. If you are on Spring Boot, the README gives you a tutorial link that is the intended entry point. Then check the maintenance picture from the outside. The repository is not archived and the last push was on 2026-09-21, which is recent enough that the project is not in decline, and the releases in August show active publishing. The three-line version story described earlier is the thing to understand before you upgrade later. Finally, decide whether you need federation at all. If your graph is one service, GraphQL Java is sufficient and the federation question is noise. If you expect to split the graph across teams and services, the federation decision belongs to the feddi project, and you should evaluate that project rather than assuming GraphQL Java's release cadence covers it. ## Conclusion GraphQL Java is the sensible default when a JVM team wants GraphQL without writing a server, because the specification work, the query planning and the long tail of schema semantics are already solved and the artefact is on Maven Central. It is the wrong choice if you need GraphQL only in a small service and would rather not carry the schema tooling, or if your other systems are not on the JVM and you would end up running two GraphQL runtimes. Check two things first: that your build tooling can resolve the coordinates the README points at, and whether your HTTP layer is one the documentation covers, because the repository itself deliberately says nothing about either. ## FAQ ### Is GraphQL Java still maintained? The repository is not archived and the last push was on 2026-09-21, with releases v24.4, v25.1 and v26.1 published on 2026-08-24. Three parallel major version lines published together indicate a project that maintains several supported lines at once. ### How do I add GraphQL Java to a Maven project? The README does not include a dependency snippet and instead points to the Maven Central directory for the latest build. Adding the library also depends on which HTTP layer you use, so the getting started documentation at graphql-java.com is the place that covers the wiring, including the Spring Boot tutorial. ### Does GraphQL Java include federation support? Not directly. The README describes GraphQL Java as the foundation for JVM GraphQL services and points federation users to feddi, a separate project that implements the GraphQL Composite Schemas Specification and runs as a standalone gateway. The README states feddi is developed independently from GraphQL Java. ## Sources - [graphql-java/graphql-java on GitHub](https://github.com/graphql-java/graphql-java) - [License: MIT](https://github.com/graphql-java/graphql-java/blob/master/LICENSE) - [Project website](https://graphql-java.com) - [README](https://github.com/graphql-java/graphql-java/blob/master/README.md) - [Releases](https://github.com/graphql-java/graphql-java/releases) --- Hysen Labs editorial analysis, written from the project's own repository and release notes. Cite the canonical page: https://hysenlabs.com/projects/graphql-java-graphql-java