i believe you have to allocate your Stings when you're adding them to
the hash table, don't you? i.e.:
hTable.put(new String("1"), new String("Premiere chaine"));
i've been doing this and haven't had any problems (yet) with hash
tables. if this is incorrect please, someone, let me know.
..............ron.
> Maxime Poulin wrote:
>
> Hi all !
>
> I have a strange problem here...
>
> I have an HttpServlet. This servlet receives request in its doGet
> method. If the request has a specific parameter, I know I have to send
> the answer as a serialized object. This is fairly simple :
>
> public void doGet(HttpServletRequest req, HttpServletResponse res)
> throws ServletException, IOException
> {
> // CHeck if the client wishes to receive the information using a
> socket.
> if ("use_socket".equalsIgnoreCase(req.getParameter("format")))
> {
> ObjectOutputStream out = new
> ObjectOutputStream(res.getOutputStream());
> // out.writeObject(new java.awt.Rectangle(1,2,3,4));
>
> Hashtable hTable = new Hashtable(0,1);
> hTable.put("1", "Premiere chaine");
> hTable.put("2", "Seconde chaine");
> out.writeObject(hTable);
> }
> else
> {
> res.setContentType("text/html");
> PrintWriter out = new PrintWriter (res.getOutputStream());
> out.println("<html>");
> out.println("<head><title>Servlet1</title></head>");
> out.println("<body>");
> out.println("Dynamically generated by servlet.");
> out.println("</body></html>");
> out.close();
> }
> }
> And then I have this applet which sends the request and reads the
> answer as :
>
> try
> {
> URL url = new URL(getCodeBase() + "servlet/Servlet1");
> String params = "?format=use_socket";
> url = new URL(url.toExternalForm() + params);
> myTextArea.append("\nOpening " + url);
>
> URLConnection con = url.openConnection();
> con.setUseCaches(false);
>
> ObjectInputStream input = new
> ObjectInputStream(con.getInputStream());
> Object obj = input.readObject();
> myTextArea.append("\nReading answer.");
> myTextArea.append("\n" + obj.toString());
> ..............
> }
> catch(Exception e)
> {
> }
>
> As you can see, this is very very simple. I tried with a Date
> object and it works perfectly. I also tried with a java.awt.Rectangle
> and it also works perfectly. However, when I try with a Hashtable, I
> get an exception quite strange :
>
> --
> java.io.FileNotFoundException:
> localhost:80//servlet/Servlet1?format=use_socket
> --
>
> What does this means ? I can't use Hashtable ? It does implement
> Serializable so where is the problem ? If the same code works for a
> Rectangle or a Date, I can hardly see why it won't work with a
> Hashtable ???
>
> Any idea ?
>
> Maxime.
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