Rust and JVM are deeply integrated to build high-performance applications

In the field of technology, the Java Virtual Machine (JVM) has always dominated with its outstanding performance and cross platform features. At the same time, Rust language has gradually emerged with its advantages of memory safety and concurrency. Combining the two, complementing each other’s strengths and weaknesses, has become a new direction for developers to pursue ultimate performance and security.

Advantages and limitations of JVM

JNI (Java Native Interface) is a mechanism provided by Java for calling local code. Through JNI, Java code can interact with code written in languages such as C/C++and Rust.

Here is a simple example demonstrating how to use JNI to implement Java calling Rust code:

1. Define Java interfaces

public class RustIntegration {
    public native int doubleValue(int input);    static {
        System.loadLibrary("rust_lib");      //Load Rust dynamic library     
    }
}

2. Generate C-header files

usejavacCompile Java code with commands and usejavahGenerate a C header file using the command.

javac RustIntegration.java
javah RustIntegration

3. Implement Rust functions

In Rust code, using#[no_mangle]Attribute tagging functions to prevent function names from being confused.