public class TesteJava
{
   public static int intMethod(int n)
   {
      System.out.println("TesteJava: Método estático intMethod: n = " + n);
      return (n * n);
   }

   public static boolean booleanMethod(boolean bool)
   {
      System.out.println("TesteJava: Método estático booleanMethod");
      return (!bool);
   }
}

/**
* Arquivo main.cpp
*/

#include <jni.h>
#include <memory.h>
#include <stdio.h>

#ifdef _WIN32
#define PATH_SEPARATOR ';'
#else
#define PATH_SEPARATOR ':'
#endif

int main()
{
    JavaVMOption options[1];
    JNIEnv *env;
    JavaVM *jvm;
    JavaVMInitArgs vm_args;
    long status;
    jclass cls;
    jmethodID mid;
    jint square;
    jboolean _not;

    options[0].optionString = "-Djava.class.path=.";
    memset(&vm_args, 0, sizeof(vm_args));
    vm_args.version = JNI_VERSION_1_2;

    vm_args.nOptions = 1;
    vm_args.options = options;
    status = JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args);

    if (status != JNI_ERR)
    {
        cls = env->FindClass("TesteJava");

        if (cls != 0)
        {
            mid = env->GetStaticMethodID(cls, "intMethod", "(I)I");

            if (mid != 0)
            {
                square = env->CallStaticIntMethod(cls, mid, 5);
                printf("main.cpp: Retorno da função intMethod: %d\n", square);
            }

            mid = env->GetStaticMethodID(cls, "booleanMethod", "(Z)Z");

            if (mid != 0)
            {
                _not = env->CallStaticBooleanMethod(cls, mid, 1);
                printf("main.cpp: Retorno da função booleanMethod: %d\n", _not);
            }
        }

    getchar();

    jvm->DestroyJavaVM();

    return (0);
    }
    else
    {
        return (-1);
    }
}