初始化JNI_CreateJavaVM的第三个参数

时间:2012-06-08 05:53:31

标签: java java-native-interface

方法JNI_CreateJavaVM的第三个参数将第三个参数作为JavaVMInitArgs结构。

typedef struct JavaVMInitArgs { 
                     jint version; 
                     jint nOptions; 
                     JavaVMOption *options; 
                     jboolean ignoreUnrecognized; 
                 } JavaVMInitArgs;

我如何初始化这个?我无法这样做。

JNI_CreateJavaVM的原型jint JNI_CreateJavaVM(JavaVM **pvm, void **penv, void *vm_args);

如何初始化vm_args?

1 个答案:

答案 0 :(得分:5)

经过一番讨论,我们得出结论,你的编译器设置有问题。

为了能够成功编译和链接JNI_CreateJavaVM,您需要将jvm库添加到链接器。


初步答复:

查看The Invocation API以下示例可能会解释您需要做什么:

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) ...