Class not found exception

I am learning reflection in Java. I came to know that we can easily extract methods used in a class file with reflection.

I have a java class file which has n number of methods.

Test file refers to the java class from where I want to read the methods used and testSample is my class from where I am accessing Testfile class methods

public class testSample
{

    public static void main(String args[]) throws ClassNotFoundException

    {

        File filename = new File(
                "C:/ProgramData/Eclipse/Projects_3.7.1/Testfile.java");

        String filen = filename.toString();

        if (filen.endsWith(".java"))

        {

            String actfilename = StringUtils.substringBefore(filen, ".java");

            Class classname = Class.forName(actfilename);

            Method[] method = classname.getMethods();

            for (Method methods : method)

            {

                System.out.println("Method name \r\n" + methods.getName());

                Class[] parameters = methods.getParameterTypes();

                for (Class parametername : parameters)

                {

                    System.out.println("parameters name \r\n"
                            + parametername.getName());

                }

            }

        }

    }
}

Please help me out of this.. I am pasting the entire code so that it could be easy for you to identify my problem.

Thanks in advance.