Error In Java While Executing the Program from CMD

Hello All, I am a B.tech final year student and working on an online Java Course. We are presently working on building the following instantiation code:

public class NameDriver
{
   public static void main (String[] args)
   {
      //Instantiation
      Name myName = new Name("Scott", "David", "Mitchell");
      Name myName1 = new Name("David", "Mitchell");
      Name myName2 = new Name("Mitchell");
      Name noName;
      System.out.println("myName: " + myName.toString());
   }
}

I am using online java compiler from here and getting this error:

//Constructor Methods
   public Name(String f, String m, String l)
   {
      first = f;
      middle = m;
      last = l;
   }

   public Name(String f, String l)
   {
      first = f;
      middle = "";
      last = l;
   }

   public Name(String l)
   {
      first = "";
      middle = "";
      last = l;
   }

   public Name()
   {
      first = "";
      middle = "";
      last = "";
   }

   public String toString()
   {
      return first + " " + middle + " " + last;
   }
 }

The result when I execute is the error message “Error: Could not find or load main class”.

The names of the Java files duplicate the name of the Main Class, so that doesn’t seem to be the problem. Can anyone suggest me the right path of this program?