Loading a class not on classpath

Question

how can we load a class not on classpath?

Answer 1

uddinr0121 wrote:
try this
private void addArchive(File jarFile) throws IOException {
URL u = jarFile.toURI().toURL();
URLClassLoader sysloader = (URLClassLoader) ClassLoader.getSystemClassLoader();
Class<?> sysclass = URLClassLoader.class;
try {
Method method = sysclass.getDeclaredMethod("addURL", parameters);
method.setAccessible(true);
method.invoke(sysloader, new Object[]{u});
} catch (Throwable t) {
t.printStackTrace();
}this will add the jar file to the classpath after which you should be able to invoke using Class.forName()
hope this helpsThat's a horrible solution, when you can just create a new URLClassLoader and use that to load the class.
Adding it to the system classpath with reflection trickery is not really a clean solution to that.