I think a better term would be 'deal with the exception' since the method in
question doesn't have to catch the exception (the method can declare that it
throws the exception in which case the mehod calling this method would have
to deal with it). The problem is that the super class (which actually calls
doGet() and doPost()) doesn't actually doesn't declare a SQLException that
it catches. I haven't tried his code out, but I would assume there'd be
some compile errors there.
Erik Sahl
[EMAIL PROTECTED]
> -----Original Message-----
> From: A mailing list for discussion about Sun Microsystem's Java Servlet
> API Technology. [mailto:[EMAIL PROTECTED]]On Behalf Of They
> Sent: Friday, February 26, 1999 2:16 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Help please - as I'm going crazy
>
>
> For clarification, I think Vyas was pointing out that if a method
> throws an exception, the method that _calls_ it must be explicitly
> prepared to catch it. In Sam's code, whatever calls doGet or doPost,
> whether from inside the class 'newlite' or not, has to be prepared to
> catch both a ServletException and an IOException.
>
> On Fri, 26 Feb 1999, Milt Epstein wrote:
>
> > On Fri, 26 Feb 1999, Vyas Vemu wrote:
> >
> > > if you 'throw' a particular exception in your class declaration, you
> > > must also specifically 'catch' it..
> >
> > Not sure if there's a "not" missing here, but as stated, this is
> > incorrect. If you catch a particular exception within a method, it
> > doesn't make sense to declare that method as throwing it, since that
> > will never happen (assuming you catch all possible places where that
> > exception could occur and you don't specifically throw it elsewhere).
> > I'm not sure there's any harm in doing so (I don't think the compiler
> > will complain), there's just no point in doing so. Usually you either
> > do one or the other, i.e. catch it locally and handle it, or not do
> > anything and have it passed back up the calling stack.
> >
> >
> > > Sam Rose wrote:
> > >
> [snip]
> > > >
> > > > public class newlite extends HttpServlet {
> > > >
> > > > public void dostuff (HttpServletRequest req,
> HttpServletResponse res)
> > > > throws SQLException, ServletException, IOException {
> > > >
> > > > HttpSession tsession=req.getSession(true);
> > > > res.setContentType("text/html");
> > > > PrintWriter os=res.getWriter();
> > > >
> > > > try { Class.forName( "oracle.jdbc.driver.OracleDriver" );
> > > > os.println("<p>");
> > > > }
> > > > catch (java.lang.ClassNotFoundException e) {
> > > > os.print("ClassNotFound: ");
> > > > os.println(e.getMessage());
> > > > }
> > > > try {
> > > > con = DriverManager.getConnection();
> > > > stmt = con.createStatement();
> > > >
> > > > }//endtry
> > > >
> > > > catch (java.sql.SQLException ex) {
> > > > os.println("SQLExcption: " +
> ex.getMessage());
> > > > }//endcatch
> > > >
> > > > finally {
> > > > if (con != null) {
> > > > con.close(); }//endif
> > > > if (stmt != null) {
> > > > stmt.close();}//endif
> > > > }//endfinally
> > > >
> > > > }//end dostuff
> > > >
> > > > public void doGet (HttpServletRequest req,
> HttpServletResponse res)
> > > > throws ServletException, IOException {
> > > > dostuff(req, res);
> > > > }
> > > >
> > > > public void doPost (HttpServletRequest req,
> HttpServletResponse res)
> > > > throws ServletException, IOException {
> > > > dostuff(req, res);
> > > > }
> > > > }//end
>
> Corey Feder
> Columbia University
>
> Please ignore the things that come out of my mouth. I'm a student; I'm
> trained to speak as if I know what I'm talking about, especially when I
> don't.
>
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