Use Java for model training, data pipelines, and JVM-based ML integration when platform consistency matters more than Python-first experimentation.
Java is not the default choice for every data-science workflow, but it remains valuable when the surrounding platform is already JVM-based, deployment constraints are strict, or model execution must live close to existing Java systems.
This section covers library selection, data-processing pipelines, model-building trade-offs, and recurring design patterns in Java-based machine learning applications.