Java remains one of the most popular languages for corporate development. But a "pure" language is always not enough — the real power is revealed in the ecosystem of libraries and frameworks. In 2025, the Java developer toolkit was updated: performance, cloud integration, support for microservices and artificial intelligence came to the fore.
Let's take a look Top 10 libraries that Java developers will find hard to do without in 2025.
1. Spring Boot 3.x
Support GraalVM and native compilation.
Simplified launch of REST services.
Integration with Kubernetes and clouds.
New starters for working with Kafka, Redis, PostgreSQL.
2. Quarkus
Fast loading (milliseconds).
Low memory consumption.
Works great with GraalVM and JVM.
Extensions for Hibernate, Kafka, gRPC.
3. Project Reactor
Reactive programming for asynchronous data streams. Spring WebFlux basis.
4. Micronaut
Framework for lightweight and native applications with support for AWS Lambda and GCP Functions.
5. Hibernate ORM 6
New version with support for Jakarta EE 10, SQL optimization and the ability to work with NoSQL.
6. Apache Kafka Clients
A modern standard for streaming and event-driven architecture.
7. Lombok
Generation of getters, setters, and constructors without template code.
8. JUnit 5 + Testcontainers
Modular and integration tests with real services in Docker.
9. Jackson + JSON-B
JSON serialization and deserialization, JSON Schema validation support.
10. Deep Java Library (DJL)
Framework for integrating artificial intelligence: support for PyTorch, TensorFlow, ONNX.
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