Class RegKeyException
public class RegKeyException extends IOException
{
  // Constructors
  public RegKeyException();
  public RegKeyException(String s);
}
This class signals that an I/O exception has occurred. 
IOException
  |
  +--RegKeyException
public RegKeyException();
Constructs a RegKeyException with no detail message. 
public RegKeyException(String s);
Constructs a RegKeyException object with a detail message. 
| Parameter | Description | 
| s | the detail message, which is a string that describes the specified exception. |