Java tutorial
import java.io.File; import java.net.URL; import java.net.URLClassLoader; public class Main { public static void main(String[] argv) throws Exception { File file = new File("c:\\class\\"); URL url = file.toURI().toURL(); URL[] urls = new URL[] { url }; ClassLoader loader = new URLClassLoader(urls); Class cls = loader.loadClass("user.informatin.Class"); } }