Load a Class that is not on the classpath : URLClassLoader « Class Definition « Java Tutorial

1. Java Tutorial
2. Class Definition
3. URLClassLoader

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");
  }
}