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:
>
> > Please could someone point out to me exactly where I am going wrong
> > with this code. I am trying to put in a finally clause, but it doesn't
> > compile, I have tried just about everything.
> >
> > I would be very grateful if someone could tell me where exactly I'm
> > going wrong in my code.
> >
> > import java.io.*;
> > import java.util.*;
> > import java.sql.*;
> > import javax.servlet.*;
> > import javax.servlet.http.*;
> >
> > 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
> >
>
Milt Epstein
Research Programmer
Software/Systems Development Group
Computing and Communications Services Office (CCSO)
University of Illinois at Urbana-Champaign (UIUC)
[EMAIL PROTECTED]
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