当从C++创建JVM时，从JAVA调用本机方法？

public class HelloWorld {
    public native void printHello();

    static {
        System.loadLibrary("HelloWorldImpl");
    }

    public static void main(String[] args) {
        new HelloWorld().printHello();
    }
}

#include <jni.h>
#include <iostream>

extern "C" JNIEXPORT void JNICALL Java_HelloWorld_printHello(JNIEnv *env, jobject obj) {
    std::cout << "Hello from C++!" << std::endl;
}

int main(int argc, char **argv) {
    JavaVM *jvm;
    JNIEnv *env;
    JavaVMInitArgs vm_args;
    JavaVMOption options[1];

    options[0].optionString = "-Djava.class.path=./";
    vm_args.version = JNI_VERSION_1_8;
    vm_args.nOptions = 1;
    vm_args.options = options;
    vm_args.ignoreUnrecognized = JNI_FALSE;

    // Create the JVM
    jint res = JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args);
    if (res != JNI_OK) {
        std::cerr << "Failed to create JVM" << std::endl;
        return -1;
    }

    // Load the Java class
    jclass cls = env->FindClass("HelloWorld");
    if (cls == nullptr) {
        std::cerr << "Failed to find class" << std::endl;
        jvm->DestroyJavaVM();
        return -1;
    }

    // Find the main method
    jmethodID mid = env->GetStaticMethodID(cls, "main", "([Ljava/lang/String;)V");
    if (mid == nullptr) {
        std::cerr << "Failed to find main method" << std::endl;
        jvm->DestroyJavaVM();
        return -1;
    }

    // Call the main method
    env->CallStaticVoidMethod(cls, mid, nullptr);

    // Destroy the JVM
    jvm->DestroyJavaVM();

    return 0;
}