Class file not loading

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Java

system

A.java is in C directory and B.java is in D directory. I am trying to load B.class in runtime using the following code:

import java.io.*;
import java.lang.reflect.Method;
import java.util.*;
import java.net.*;


class A
{
@SuppressWarnings("deprecation")
private static final Class[] parameters = new Class[]{URL.class};
public static void addFile(String s) throws IOException {
    File f = new File(s);
    addFile(f);
  }//end method

  public static void addFile(File f) throws IOException {
    addURL(f.toURL());
  }
public static void addURL(URL u) throws IOException {

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();
throw new IOException("Error, could not add URL to system classloader");
}
}
public static void main(String[] args) throws IOException
{
	String u="E:\\javadem\\";
	addFile(u);
    Class.forName("B");
	System.out.println(System.getProperty("java.class.path"));
B obj=new B(); //here, it shows the error.
 }


}

What I have tried:

Now, it loads the class. The problem is I cannot access the class. If I try to create a object for that class, it shows the following error:

B cannot be resolved to a type

How can I access that class file?