Backend2026-05-17
Java
Also known as: Java / ジャバ
A statically typed OOP language running on the JVM, developed by Sun and now Oracle. Spring Boot makes it the de facto standard for enterprise backend development in large-scale business systems.
Overview
Java is the dominant enterprise language alongside Kotlin on the JVM. Spring Boot and Spring Cloud microservice patterns are widespread in corporate systems. GraalVM now also enables native binary compilation.
Legacy Modernization Context
Many Japanese enterprises run Java-based business systems, making Java expertise critical for cloud migration and modernization projects. See legacy system modernization guide for details.
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