Java Trainings

Java: 30 years of presence in critical information systems

Java, created by Sun Microsystems in 1995 and now carried by Oracle (with a strong open source ecosystem via OpenJDK), remains in 2026 one of widely used programming languages in critical information systems. Private banks, insurance companies, international organisations, software vendors, e-commerce and public actors maintain in French-speaking Switzerland a major Java application estate, ranging from historical Java EE applications to new cloud-native Spring Boot architectures. The JVM also carries other compiled languages (Kotlin, Scala, Groovy) that share the same foundations.

ITTA offers a catalogue dedicated to Java covering language fundamentals (Java SE), advanced modern usages (collections, streams, lambdas, modules, records, virtual threads), dominant frameworks (Spring Boot, Spring Cloud, Quarkus) and the enterprise ecosystem (Jakarta EE, formerly Java EE). Our Java trainers are developers and architects active in Java production projects at Swiss banks, insurers and software vendors, allowing them to share concrete cases and configurations directly usable.

Following a recognised Java training opens access to highly valued roles: Java back-end developer, software engineer, lead developer, application architect, cloud-native engineer. Java remains widely expected in back-end job descriptions in French-speaking Switzerland, particularly at private banks (risk computing, e-banking, anti-money laundering), insurers (underwriting, claims) and business software vendors.

Whether you are a developer in initial training.NET or Python profile moving to Java, engineer ramping up on Spring, technical lead or application architect, our Java training in Geneva and Lausanne provides the practical skills expected on the Swiss market to join a Java production team or evolve a historical codebase.

ITTA Java training catalogue

Java SE Fundamentals

The Java SE Fundamentals training lays the language and object paradigm basics in Java. The programme covers modern Java syntax, classes, inheritance, interfaces, collections, exception management, input-output, basic threads, and production best practices. This training suits beginner Java developers, profiles in transition from another language and engineering students.

Java SE Advanced

The Java SE Advanced training deepens the modern features of the language: Streams API and functional programming, lambdas, Optional, JPMS modules (Java 9+), records (Java 14+), pattern matching (Java 17+), virtual threads (Java 21+), CompletableFuture, NIO. This training suits confirmed Java developers modernising their practice and leveraging recent LTS versions (Java 17, Java 21).

Spring Boot and Spring Cloud (modern architectures)

Spring Boot has established itself as a widely used tool Java framework for web applications and microservices. Our catalogue covers Spring Boot for REST APIs, data access with Spring Data JPA and Spring Data MongoDB, security with Spring Security and OAuth2, testing with JUnit and Mockito, and Actuator observability. Spring Cloud brings the microservices dimension (config server, service discovery, circuit breaker, gateway). These training courses suit Java developers modernising towards cloud-native.

Jakarta EE and Java Enterprise

For organisations maintaining a Java EE heritage (now Jakarta EE), our catalogue covers standard APIs (CDI, JPA, JAX-RS, JMS, EJB) and their evolution in Jakarta EE 10+. This training suits profiles maintaining or modernising a historical Java enterprise application.

The Java ecosystem and complementary technologies

Java fits into a broader development ecosystem. The programming languages sub-domain covers Python, C# and JavaScript, complementary or alternative according to contexts. Object-oriented programming training brings C++ and UML, complementary to Java on the design side. The database design sub-domain covers SQL, NoSQL and Apache Kafka, frequent sources of Java applications. Containerisation and orchestration training covers Docker and Kubernetes, naturally used to deploy Java in production. The CI/CD versioning delivery sub-domain covers GitLab and Jenkins, building blocks of the modern Java chain. The cloud computing domain brings Azure and AWS certifications, main platforms for modern Java workloads.

Java trends in 2026

Several evolutions are shaping Java in 2026. Java 21 (LTS) is a widely used tool stable version, with virtual threads, pattern matching and records. Upcoming Java 25 (LTS) continues to enrich the language. Spring Boot 3 and Spring Cloud 2024 modernise the ecosystem (Jakarta EE 10, native observability via Micrometer). GraalVM enables native AOT compilation to reduce startup times and memory consumption, particularly useful in serverless. Quarkus continues to gain ground over Spring Boot for cloud-native. AI agents (GitHub Copilot, Claude Code) accelerate Java productivity. Our pedagogical content regularly integrates these evolutions to remain aligned with current company practices.

Java training in Geneva, Lausanne and online

All our Java training courses are available on-site in our Geneva and Lausanne centres, as well as in interactive virtual classroom with a live trainer. Our sessions are organised in 5-week cycles. Each session includes hands-on labs on realistic Java projects and the use of modern IDEs (IntelliJ IDEA, Eclipse). Customised corporate training is also possible at your premises, in Geneva, Lausanne, Vaud and across French-speaking Switzerland, with a programme adapted to your internal stack (Java versions, frameworks, conventions).

Why choose ITTA

ITTA offers a training catalogue. Our Java trainers are back-end developers and application architects active in Java production projects for Swiss and international companies. The Java catalogue regroups our training courses covering Java SE, Spring Boot and Jakarta EE. Our pedagogical team supports you in choosing the right path and identifying the funding solutions that fit your professional situation.

Featured courses in this catalogue

Here is a selection of reference training courses in this catalogue, accessible directly:

• Developing with EJB3 in Java EE
• Introduction to Data Persistence with Hibernate
• JAVA SE Programming I
• JAVA SE Programming II
• J2EE Web Development
• Developing Applications for the Java EE 7 Platform
• Introduction to Data Persistence with JPA
• Introduction to Web Applications development with JSF

FAQ

Is programming experience required before Java SE Fundamentals?

Prior experience in an object language (C#, Python, JavaScript) facilitates Java onboarding. The Java SE Fundamentals training nonetheless remains accessible to profiles without prior programming experience, provided they have good IT ease and analytical logic.

Which Java version to use to start?

Java 21 (LTS) is a widely used tool stable version in 2026 and our training courses cover this version by default. For organisations maintaining Java 17 or Java 11 (previous LTS), we adapt the content to features available in the target version. Older versions (Java 8) remain addressed for historical application maintenance.

Spring Boot or Quarkus: which to choose?

Spring Boot remains the dominant Java framework in companies, with a mature ecosystem (Spring Cloud, Spring Security, Spring Data). Quarkus is more recent, particularly performant in cloud-native and serverless thanks to GraalVM, and adopted at Kubernetes-oriented profiles. Both frameworks often coexist. Our pedagogical team guides you according to your stack.

Are your Java courses available for companies?

Yes, the entire Java catalogue is available in-house, in Geneva, Lausanne and in virtual classroom, with a programme adapted to your internal stack. Our team builds the specifications with you and organises sessions according to your calendar.