问题描述
方法JNI_CreateJavaVM
的第三个参数将第三个参数作为JavaVMInitArgs
结构.
The third argument of the method JNI_CreateJavaVM
takes the third argument as JavaVMInitArgs
structure.
typedef struct JavaVMInitArgs {
jint version;
jint nOptions;
JavaVMOption *options;
jboolean ignoreUnrecognized;
} JavaVMInitArgs;
我该如何初始化?我无法这样做.
How do i initialize this ? I am unable to do so.
JNI_CreateJavaVM的原型:jint JNI_CreateJavaVM(JavaVM **pvm, void **penv, void *vm_args);
Prototype of JNI_CreateJavaVM: jint JNI_CreateJavaVM(JavaVM **pvm, void **penv, void *vm_args);
如何初始化vm_args?
How do i initialize vm_args ?
推荐答案
经过一番讨论,我们得出的结论是您的编译器设置存在问题.
要成功编译并链接JNI_CreateJavaVM
,您需要将jvm
库添加到链接器中.
To be able to successfully compile and link JNI_CreateJavaVM
you need to add the jvm
library to your linker.
查看调用API 以下示例可能会说明您需要做什么:
Looking at The Invocation API the following example might explain what you need to do:
JavaVMInitArgs vm_args;
JavaVMOption options[4];
options[0].optionString = "-Djava.compiler=NONE"; /* disable JIT */
options[1].optionString = "-Djava.class.path=c:\myclasses"; /* user classes */
options[2].optionString = "-Djava.library.path=c:\mylibs"; /* set native library path */
options[3].optionString = "-verbose:jni"; /* print JNI-related messages */
vm_args.version = JNI_VERSION_1_2;
vm_args.options = options;
vm_args.nOptions = 4;
vm_args.ignoreUnrecognized = TRUE;
/* Note that in the JDK, there is no longer any need to call
* JNI_GetDefaultJavaVMInitArgs.
*/
res = JNI_CreateJavaVM(&vm, (void **)&env, &vm_args);
if (res < 0) ...
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