Hi:
I was trying to write a windows service for bajie http server. I am
using VC++ 5.0 on windows XP,
and JDK 1.3.1. (JDK 1.4 is also installed, but are not used).
When I try to execute the code below, I got the error -1 when
JNI_CreateJavaVM is called.
(If I use JavaVM1_1InitArgs structure, I got error -3).
Can someone tell me what is wrong with the code? I was just using the
code from java.sun.com's
example, with a little bit of modification.
Thank you!
Gang
Here is the code to invoke the jvm from native code:
// jinvoker.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include "windows.h"
#include <jni.h>
#define PATH_SEPARATOR ';'
#define USER_CLASSPATH "."
void main() {
JNIEnv *env=NULL;
JavaVM *jvm;
jint res;
jclass cls;
jmethodID mid;
char classpath[1024];
/* IMPORTANT: specify vm_args version # if you use JDK1.1.2 and beyond
*/
JavaVMInitArgs vm_args;
JavaVMOption options[1];
options[0].optionString =
"-Djava.class.path= d:\\httpsrv\\jzHttpSrv.jar;d:\\lib\\rt.jar";
vm_args.version = 0x00010002;
vm_args.options = options;
vm_args.nOptions = 1;
vm_args.ignoreUnrecognized = JNI_TRUE;
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 */
//fail right here with error code -1.
res = JNI_CreateJavaVM(&jvm,(void **)&env,&vm_args);
if (res < 0) {
fprintf(stderr, "Can't create Java VM %i\n",res);
exit(1);
}
jvm->DestroyJavaVM();
}
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