Hi friend,

Code to help solve the problem

1.In Webcrawler class creates the object of caheurl.
2 In Webcrawlerwindow class creates the object of Webcrawler.


class caheurl{
public void showUrl()
{
System.out.println("Welcome caheurl");
}
}
class Webcrawler extends caheurl{

public void showCrawler()
{
caheurl cu = new caheurl();
cu.showUrl();

System.out.println("Welcome Webcrawler");
}
}

public class Webcrawlerwindow extends Webcrawler{

public static void main(String args[])
{
Webcrawlerwindow ww = new Webcrawlerwindow();

ww.showUrl();
ww.showCrawler();
System.out.println("Welcome Webcrawlerwindow");
}

}

Read more information in details :

http://www.roseindia.net/java/

Thanks