Class path fully qualified vs offset

Question

I am invoking a JVM from a c++ application and I am having problems setting a fully qualified classpath. If I set the class path like the following, I get NoClassDefFoundError errors.
stringstream classPath;
classPath << "-Djava.class.path=/home/user1/application"
<< ":/home/user1/application/myjar1.jar"
     << ":/home/user1/application/myjar2.jar"
     << ":/home/user1/application/myjar3.jar"
     << ":/home/user1/application/myjar4.jar";
But, if I set the class path as an offset from the directory in which I launch my application, everything works correctly.
classPath << "-Djava.class.path=."
<< ":./myjar1.jar"
     << ":./myjar2.jar"
     << ":./myjar3.jar"
     << ":./myjar4.jar";
The remaining code to set up the JavaVMOptions:
JavaVMOption options[4];
options[0].optionString = "-Djava.compiler=NONE";
options[1].optionString = (char *)(classPath.str().c_str());
options[2].optionString = "-Djava.library.path=.";
options[3].optionString = "-Xmx1000m";
Anyone have any similar problems?

Answer 1

Actually, what I did is to copy (sprintf) the string
stream's char * to a local char * variable. Then I
set the classpath optionString equal to the local char
*. Seems unecessary but it works.Not sure if that is a good idea but it depends on what you mean by "local char *".
If you want to do a dynamic classpath then use one of the following..
1. A global char array with a fixed (big) size.
2. A global char pointer that you initialize to the size needed.
With either of the above you can also use the string stream by passing in the array via the constructor.