While trying to use jar inside c++ code give me error : libjvm.so cannot open shared object file.

I have a jar file named Untitled.jar that prints some text message. It has a void function call giveMeString() and the class name is xegerImplementation.

giveMeString() generates string for the regular expression defined inside the giveMeString(). I needed to generate strings given a regular expression in c++. Since java has a library called xeger that does this, so I thought to create a jar and then import that inside the c++ code.

I have implemented the following code which I got from http://ift.tt/2A9gbku and tweaked it to match my jar file.

The cpp file name is main.cpp and has the following code.

#include <iostream>
#include "jni.h"
int main(){
    JavaVM *jvm;       /* denotes a Java VM */
    JNIEnv *env;       /* pointer to native method interface */
    JavaVMInitArgs vm_args; /* JDK/JRE 9 VM initialization arguments */
    JavaVMOption* options = new JavaVMOption[1];
    options[0].optionString = "-Djava.class.path=/home/aaa/Desktop/Untitled.jar";
    vm_args.version = JNI_VERSION_1_8;
    vm_args.nOptions = 1;
    vm_args.options = options;
    vm_args.ignoreUnrecognized = false;
/* load and initialize a Java VM, return a JNI interface
 * pointer in env */
    JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args);
    delete options;
/* invoke the Main.test method using the JNI */
    jclass cls = env->FindClass("xegerImplementation");
    jmethodID mid = env->GetStaticMethodID(cls, "giveMeString", "(I)V");
    env->CallStaticVoidMethod(cls, mid);
/* We are done. */
    jvm->DestroyJavaVM();
}

When I was using g++ main.cpp -o main to generate the executable main file. But it gave me the following error :

/tmp/ccf3LtdA.o: In function `main':
main.cpp:(.text+0x5d): undefined reference to `JNI_CreateJavaVM'
collect2: error: ld returned 1 exit status

Then with the help from stackoverflow, I was able to solve this error by compiling it with the following code:

g++ -g -I/usr/lib/jvm/java-8-oracle/include/ -I/usr/lib/jvm/java-8-oracle/include/linux/ -L/usr/bin/java -L/usr/lib/jvm/java-8-oracle/jre/lib/amd64/server/ main.cpp -o main -ljvm

It generates the executable main file.

Then, I tried to run the executable main file with the following command

./main

It gives me the following error:

./main: error while loading shared libraries: libjvm.so: cannot open shared object file: No such file or directory

I tried to add the path to libjvm.so to the LD_LIBRARY_PATH. But still it doesnot work.

What am I doing wrong? Any help would be appreciated.