Hi,
Whether you lose stacktrace information depends on whether it's an exception you rethrow as a DataInvalidException, or it's an Exception you throw yourself. As you do it now, the exception, once thrown, will have a stacktrace starting from the place where you throw the Exception.
If you catch an existing exception, and then rethrow the exception as a DataInvalidException, then you should implement the constructor with String and Throwable parameters.
For example:

public DataInvalidException(String message, Throwable t){
 super(message, t);
}

which you can use like this:

try{
  //  your code that might throw some Exception
}catch(Exception e){
 throw new DataInvalidException("Data is invalid", e);
}

Cheers,
Frans

On Sun, 23 Oct 2005 17:46:57 -0600, SUBSCRIBE EJB-INTEREST anonymous wrote:
> Hi,
> I have an class derived from Exception and have one
> constructor,which takes only a String as parameter.
> In my application, I just use the below line to throw the
> exception.Is this correct?Since, exception object is not passed to
> the constructor, will I lose any stacktrace information?
>
>
> throw new DataInvalidException("Datais invalid");
>
> Thanks in advance,
>
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