/* Note: This program only works on Win32.*/#include <windows.h>#include <jni.h>JavaVM *jvm;void thread_fun(void *arg){    jint res;    jclass cls;    jmethodID mid;    jstring jstr;    jobjectArray args;    JNIEnv *env;    char buf[100];    int threadNum = (int)arg;    /* Pass NULL as the third argument */    res = (*jvm)->AttachCurrentThread(jvm, &env, NULL);    if (res < 0) {       fprintf(stderr, "Thread %d: attach failed\n", threadNum);       return;    }    cls = (*env)->FindClass(env, "Prog");    if (cls == 0) {        fprintf(stderr, "Thread %d: Can't find Prog class\n", threadNum);        goto detach;    }    mid = (*env)->GetStaticMethodID(env, cls, "main", "([Ljava/lang/String;)V");    if (mid == 0) {        fprintf(stderr, "Thread %d: Can't find Prog.main\n", threadNum);	goto detach;    }    sprintf(buf, " from Thread %d", threadNum);    jstr = (*env)->NewStringUTF(env, buf);    if (jstr == 0) {        fprintf(stderr, "Thread %d: Out of memory\n", threadNum);        goto detach;    }    args = (*env)->NewObjectArray(env, 1,                        (*env)->FindClass(env, "java/lang/String"), jstr);    if (args == 0) {        fprintf(stderr, "Thread %d: Out of memory\n", threadNum);        goto detach;    }    (*env)->CallStaticVoidMethod(env, cls, mid, args);  detach:    if ((*env)->ExceptionOccurred(env)) {        (*env)->ExceptionDescribe(env);    }    (*jvm)->DetachCurrentThread(jvm);}#ifdef _WIN32#define PATH_SEPARATOR ';'#else /* UNIX */#define PATH_SEPARATOR ':'#endif#define USER_CLASSPATH "." /* where Prog.class is */main() {    JNIEnv *env;    JDK1_1InitArgs vm_args;    int i;    jint res;    char classpath[1024];    /* IMPORTANT: specify vm_args version # if you use JDK1.1.2 and beyond */    vm_args.version = 0x00010001;    JNI_GetDefaultJavaVMInitArgs(&vm_args);    /* Append USER_CLASSPATH to the end of default system class path */    sprintf(classpath, "%s%c%s",            vm_args.classpath, PATH_SEPARATOR, USER_CLASSPATH);    vm_args.classpath = classpath;    /* Create the Java VM */    res = JNI_CreateJavaVM(&jvm, &env, &vm_args);    if (res < 0) {        fprintf(stderr, "Can't create Java VM\n");        exit(1);    }    for (i=0; i<5; i++)        /* We pass the thread number as the argument to every thread */        _beginthread(thread_fun,0,(void *)i);    Sleep(5000); /* wait for threads to finish */    (*jvm)->DestroyJavaVM(jvm);}