Java/Development Class/URLClassLoader

Load a Class that is not on the classpath

 
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");
  }
}

Print classpath

 
import java.net.URL;
import java.net.URLClassLoader;
public class Main {
  public static void main(String[] args) {
    ClassLoader sysClassLoader = ClassLoader.getSystemClassLoader();
    URL[] urls = ((URLClassLoader) sysClassLoader).getURLs();
    for (int i = 0; i < urls.length; i++) {
      System.out.println(urls[i].getFile());
    }
  }
}