RE: Java Question on Inheritance

[Grewal, Gary]

No. The way you are doing means you are calling .toURL() method on what ever is returned by the method getThumb(). Unless getThumb returns a type of Object of type SuperOne or it's sub-class you cannot call this method and you should see a compile time error.   What you can do is   URL url = toURL( myImage.getThumb() ); in your SuperOne or its sub-class.   === Gary Grewal -----Original Message----- From: Ryan [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 22, 2001 10:38 AM To: [EMAIL PROTECTED] Subject: Java Question on Inheritance I don't really know what to call what I'm having trouble with but here is what I am trying to do.   I have a superclass called SuperOne, it has a method to convert a string to a URL format called toURL().   I have an Image class that is a subclass of SuperOne. It holds a string storing the local path of the image on my harddrive. This subclass contains a method to get the corresponding thumbnail of the image on my harddrive. The method is called getThumb().     In a third class I want to instantiate an Image object something like:     Image myImage = new Image("/home/pic.gif");     Ultimately, I want to get the thumb of this Image and convert it to a URL. I want to be able to do this efficiently and use something like the following syntax.       myImage.getThumb().toURL()     Is this possible?     thanx -ryan