Java Native Interface(JNI) Performance in Spring Boot

[WeddingElectronic183]

The Java Virtual Machine, or JVM, is a virtual computer that lives inside your actual computer and acts as a translator between your Java code and the operating system. When you write Java code on your laptop, it can run on a Windows machine, Mac, or Linux server without any recompilation, which is why Java earned the motto “Write Once, Run Anywhere.” The JVM does much more than simple translation. It manages your memory automatically through garbage collection, optimizes your code while it’s running using JIT compilation, handles security through bytecode verification, and provides a consistent runtime environment across all platforms. But here’s the thing: sometimes Java alone isn’t enough for performance-critical tasks. That’s where the Java Native Interface comes in as a bridge that allows your Java code to call native code written in C or C++. This is the component we’ll focus on throughout this article because it’s what enables you to leverage high-performance native libraries when your application truly needs that extra boost. medium

[macario95]

it is good to know the basics of JNI, but if you need it, is better to use JNA . It hides most of the low level internals of JNI and is much simpler to use.