Facing problem during invoking JNI_CreateJavaVM() method

Question

Hi,
I am stucking in this problem, the method returns -1. So I am not able to resolve this problem. I am using j2sdk1.4.2_14 and and using VC++6.0 for creatinf exe
Any help will be appreciated.
Rgds
ojak
     #include <jni.h>
     #include <windows.h>
     #define PATH_SEPARATOR ';'
//     #define USER_CLASSPATH "C:\\ojak\\JNIEXAMPLES\\attachThread\\" /* where Prog.class is */
//     #define USER_CLASSPATH "." /* where Prog.class is */
     void main() {
     JNIEnv *env;
     //JavaVM jvm = (JavaVM )0;
          //JNIEnv *env=0;
     JavaVM *jvm=0;
     jint res;
     jclass cls;
     jmethodID mid;
     jstring jstr;
     jobjectArray args;
     HINSTANCE hVM = NULL;
     JavaVMInitArgs vm_args;
     JavaVMOption options[4];
     printf("\noptions");
     options[1].optionString = "-Djava.class.path=c:\\j2sdk1.4.2_14\\jre\\lib\\rt.jar;C:\\ojak\\JNIEXAMPLES\\attachThread"; /* user classes */
//     options[2].optionString = "-Djava.library.path=C:\\j2sdk1.4.2_14\\lib\\jvm.lib"; /* set native library path */
     options[2].optionString = "-Djava.library.path=C:\\j2sdk1.4.2_14\\jre\\bin\\client\\jvm.dll"; /* set native library path */
     options[0].optionString = "-Djava.compiler=NONE";
     //options[1].optionString = "-Djava.class.path=c:\\My Folder"; /* user classes */
     //options[2].optionString = "-Djava.library.path=C:\\j2sdk1.4.2_04\\include";
     options[3].optionString = "-verbose:jni";
     printf("%s\n",options[0].optionString);
     printf("%s\n",options[1].optionString);
     printf("%s\n",options[2].optionString);
     printf("%s\n",options[3].optionString);
     hVM = LoadLibrary("C:\\j2sdk1.4.2_14\\jre\\bin\\client\\jvm.dll");
     printf("\nversion info");
     //vm_args.version = JNI_VERSION_1_4;
     vm_args.version = JNI_VERSION_1_2;
     vm_args.options = options;
     vm_args.nOptions = 4;
     vm_args.ignoreUnrecognized = JNI_FALSE;
     printf("\ncreate\n");
     if (hVM == NULL)
     printf("hVM is null ");
     if(jvm==NULL)
     printf(" It has not value\n");
     else
          printf("It contains value\n");
     res = JNI_CreateJavaVM(&jvm, (void **)&env, &vm_args);
if(jvm==NULL)
          printf("JVM is null\n");
     if(env==NULL)
          printf("ENV is null\n");
     if (res < 0) {
     fprintf(stderr, "Can't create Java VM \n",res);
     exit(1);
     cls = env->FindClass("HelloWorld");
     //cls = env.FindClass(env,"helloWorldClass");
     if (cls == 0) {
     fprintf(stderr, "Can't find Prog class\n");
     exit(1);
     mid = env->GetStaticMethodID(cls, "main", "([Ljava/lang/String;)V");
     if (mid == 0) {
     fprintf(stderr, "Can't find Prog.main\n");
     exit(1);
     jstr = env->NewStringUTF(" from C!");
     if (jstr == 0) {
     fprintf(stderr, "Out of memory\n");
     exit(1);
     args = env->NewObjectArray(1, (*env).FindClass("java/lang/String"), jstr);
     if (args == 0) {
     fprintf(stderr, "Out of memory\n");
     exit(1);
     env->CallStaticVoidMethod(cls, mid, args);
     jvm->DestroyJavaVM();

Answer 1

Hi,
I am stucking in this problem, the method returns -1. So I am not able to resolve this problem. I am using j2sdk1.4.2_14 and and using VC++6.0 for creatinf exe
Any help will be appreciated.
Rgds
ojak
     #include <jni.h>
     #include <windows.h>
     #define PATH_SEPARATOR ';'
//     #define USER_CLASSPATH "C:\\ojak\\JNIEXAMPLES\\attachThread\\" /* where Prog.class is */
//     #define USER_CLASSPATH "." /* where Prog.class is */
     void main() {
     JNIEnv *env;
     //JavaVM jvm = (JavaVM )0;
          //JNIEnv *env=0;
     JavaVM *jvm=0;
     jint res;
     jclass cls;
     jmethodID mid;
     jstring jstr;
     jobjectArray args;
     HINSTANCE hVM = NULL;
     JavaVMInitArgs vm_args;
     JavaVMOption options[4];
     printf("\noptions");
     options[1].optionString = "-Djava.class.path=c:\\j2sdk1.4.2_14\\jre\\lib\\rt.jar;C:\\ojak\\JNIEXAMPLES\\attachThread"; /* user classes */
//     options[2].optionString = "-Djava.library.path=C:\\j2sdk1.4.2_14\\lib\\jvm.lib"; /* set native library path */
     options[2].optionString = "-Djava.library.path=C:\\j2sdk1.4.2_14\\jre\\bin\\client\\jvm.dll"; /* set native library path */
     options[0].optionString = "-Djava.compiler=NONE";
     //options[1].optionString = "-Djava.class.path=c:\\My Folder"; /* user classes */
     //options[2].optionString = "-Djava.library.path=C:\\j2sdk1.4.2_04\\include";
     options[3].optionString = "-verbose:jni";
     printf("%s\n",options[0].optionString);
     printf("%s\n",options[1].optionString);
     printf("%s\n",options[2].optionString);
     printf("%s\n",options[3].optionString);
     hVM = LoadLibrary("C:\\j2sdk1.4.2_14\\jre\\bin\\client\\jvm.dll");
     printf("\nversion info");
     //vm_args.version = JNI_VERSION_1_4;
     vm_args.version = JNI_VERSION_1_2;
     vm_args.options = options;
     vm_args.nOptions = 4;
     vm_args.ignoreUnrecognized = JNI_FALSE;
     printf("\ncreate\n");
     if (hVM == NULL)
     printf("hVM is null ");
     if(jvm==NULL)
     printf(" It has not value\n");
     else
          printf("It contains value\n");
     res = JNI_CreateJavaVM(&jvm, (void **)&env, &vm_args);
if(jvm==NULL)
          printf("JVM is null\n");
     if(env==NULL)
          printf("ENV is null\n");
     if (res < 0) {
     fprintf(stderr, "Can't create Java VM \n",res);
     exit(1);
     cls = env->FindClass("HelloWorld");
     //cls = env.FindClass(env,"helloWorldClass");
     if (cls == 0) {
     fprintf(stderr, "Can't find Prog class\n");
     exit(1);
     mid = env->GetStaticMethodID(cls, "main", "([Ljava/lang/String;)V");
     if (mid == 0) {
     fprintf(stderr, "Can't find Prog.main\n");
     exit(1);
     jstr = env->NewStringUTF(" from C!");
     if (jstr == 0) {
     fprintf(stderr, "Out of memory\n");
     exit(1);
     args = env->NewObjectArray(1, (*env).FindClass("java/lang/String"), jstr);
     if (args == 0) {
     fprintf(stderr, "Out of memory\n");
     exit(1);
     env->CallStaticVoidMethod(cls, mid, args);
     jvm->DestroyJavaVM();