I get this code here on stack overflow. It's a good one but only works in Netbeans. After I generated the .jar file don't work anymore and don't give me error messages.
/**
* Scans all classes accessible from the context class loader which belong
* to the given package and subpackages.
*
* @param packageName The base package
* @return The classes
* @throws ClassNotFoundException
* @throws IOException
*/
public Class[] getClasses(String packageName)
throws ClassNotFoundException, IOException {
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
assert classLoader != null;
String path = packageName.replace('.', '/');
Enumeration<URL> resources = classLoader.getResources(path);
List<File> dirs = new ArrayList<File>();
while (resources.hasMoreElements()) {
URL resource = resources.nextElement();
dirs.add(new File(resource.getFile()));
}
ArrayList<Class> classes = new ArrayList<Class>();
for (File directory : dirs) {
classes.addAll(findClasses(directory, packageName));
}
return classes.toArray(new Class[classes.size()]);
}
/**
* Recursive method used to find all classes in a given directory and
* subdirs.
*
* @param directory The base directory
* @param packageName The package name for classes found inside the base
* directory
* @return The classes
* @throws ClassNotFoundException
*/
private List<Class> findClasses(File directory, String packageName) throws ClassNotFoundException {
List<Class> classes = new ArrayList<Class>();
if (!directory.exists()) {
return classes;
}
File[] files = directory.listFiles();
for (File file : files) {
if (file.isDirectory()) {
assert !file.getName().contains(".");
classes.addAll(findClasses(file, packageName + "." + file.getName()));
} else if (file.getName().endsWith(".class")) {
classes.add(Class.forName(packageName + '.' + file.getName().substring(0, file.getName().length() - 6)));
}
}
return classes;
}
This piece of code was encapsulated in another project to be used as my JMenu Library. but only works in netbeans. I don't understand why.
update
I will try to explain better.
I have a project to work with JMenu that works through reflection to read the classes in the other project. This project will be using as a library to others projects. When it's run on netbeans do well, but when a generate the .jar file doesn't work anymore and I receive no error messages.
