import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;
class MyClass{
public String myMethod() {
return "a message";
}
}
public class Main {
public static void main(String[] argv) throws Exception {
URL[] urls = null;
File dir = new File(System.getProperty("user.dir") + File.separator + "dir" + File.separator);
URL url = dir.toURI().toURL();
urls = new URL[] { url };
ClassLoader cl = new URLClassLoader(urls);
Class cls = cl.loadClass("MyClass");
MyClass myObj = (MyClass) cls.newInstance();
}
}