问题描述
我在写一个简单的程序,从我的C程序中调用Java函数。
I'm writing a simple program to call a Java function from my C program.
以下是我的code:
#include <jni.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <pthread.h>
#include <time.h>
#include <stdlib.h>
JNIEnv* create_vm() {
JavaVM* jvm;
JNIEnv *env;
JavaVMInitArgs vm_args;
JavaVMOption options[1];
options[0].optionString - "-Djava.class.path=/home/chanders/workspace/Samples/src/ThreadPriorityTest";
vm_args.version = JNI_VERSION_1_6;
vm_args.nOptions = 1;
vm_args.options = &options;
vm_args.ignoreUnrecognized = JNI_FALSE;
JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args);
return env;
}
void invoke_class(JNIEnv* env) {
jclass helloWorldClass;
jmethodID mainMethod;
jobjectArray applicationArgs;
jstring applicationArg0;
helloWorldClass = (*env)->FindClass(env, "InvocationHelloWorld");
mainMethod = (*env)->GetStaticMethodID(env, helloWorldClass, "main", "([Ljava/lang/String;)V");
applicationArgs = (*env)->NewObjectArray(env, 1, (*env)->FindClass(env, "java/lang/String"), NULL);
applicationArg0 = (*env)->NewStringUTF(env, "From-C-program");
(*env)->SetObjectArrayElement(env, applicationArgs, 0, applicationArg0);
(*env)->CallStaticVoidMethod(env, helloWorldClass, mainMethod, applicationArgs);
}
int main() {
JNIEnv* env = create_vm();
invoke_class(env);
}
我编译使用上述程序:
GCC -o调用-I $ JAVA_HOME /有/ -I $ JAVA_HOME /在include / linux -L $ JAVA_HOME / JRE / lib中/ AMD64 /服务器/ ThreadPriorityTest.c
I'm compiling the above program using:gcc -o invoke -I$JAVA_HOME/include/ -I$JAVA_HOME/include/linux -L$JAVA_HOME/jre/lib/amd64/server/ ThreadPriorityTest.c
和我得到了以下错误:
/tmp/ccllsK5O.o: In function `create_vm': ThreadPriorityTest.c:(.text+0x35): undefined reference to `JNI_CreateJavaVM' collect2: ld returned 1 exit status
我真的不知道是什么原因造成这个问题。
I'm not really sure what is causing this problem
更新1
包含在命令行中-ljvm,然后得到了一个未定义的引用FUNCTION_NAME
我运行它在RHEL 6.2
Included the -ljvm in the command line and then got a undefined reference to FUNCTION_NAME
I'm running it on Rhel 6.2
推荐答案
您已经得到了的路径应用于Java库(即 -L
选项),但不库本身。您需要包括 -ljvm
链接线也是如此。
You've got the path to the Java library (the -L
option), but not the library itself. You need to include -ljvm
on the link line as well.
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