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Class overwritten?

Posted on 2002-05-11
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section A)
Consider the following java classes-
GenericServlet class:
public abstract class GenericServlet extends Object implements Servlet, ServletConfig, Serializable.
HttpServlet class:
public abstract class HttpServlet extends GenericServlet implements Serializable.

section B)
Consider my class below:
public class GenericServlet extends HttpServlet.

It is the base class of HttpServlet class as in section A), however, it is again defined to be a sub-class of HttpServlet in B).
Does B) overwrite a class?
Or B) defines a totally new class only?
How is the GenericServlet be interpreted?
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Question by:kenchan2000
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2 Comments
 

Expert Comment

by:hogberg78
ID: 7003654
Homework? Think about the packages/namespaces.
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Accepted Solution

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girionis earned 200 total points
ID: 7003713
 You cannot have two classes of the same name in the same package. What you have written up there could not be compiled if you were to use it with javac. Two classes can have the same name if they reside in different packages. You would have to give the full name of the package. If you have two GenericServlet classes in different packages (package1.GenericServlet and package2.GenericServlet) then you could do something like:

// GenericServlet in package1
package package1;
public abstract class GenericServlet extends Object implements Servlet, ServletConfig, Serializable.

/ HttpServlet in either package2 or somewhere else.
public abstract class HttpServlet extends package1.GenericServlet implements Serializable

and

// Generic Servlet in package2
package package2;
public class GenericServlet extends HttpServlet.

  Hope it helps.
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