Re: NEED HELP WITH THE CODE IOException

From:

Nigel Wade <nmw@ion.le.ac.uk>

Newsgroups:

comp.lang.java.help

Date:

Mon, 16 Mar 2009 10:15:51 +0000

Message-ID:

<gpl8so$7cf$1@south.jnrs.ja.net>

Knute Johnson wrote:

HadsS wrote:

void writer() {

             FileWriter file= new FileWriter("tester.txt");
             BufferedWriter bw=new BufferedWriter(file);
             PrintWriter out = new PrintWriter(bw);

             for(int i=0;i<_currentRack.getNoOfCds();i++){

                     Vector tempV=_currentRack.getCdVector();
                     Cd _cd=((Cd)tempV.get(i));

                     out.println(_cd.getType());
                     out.println(_cd.getTitle());
                     out.println(_cd.getNoOfCopies());
                     out.println("*");
             }

             out.close();
             bw.close();
             file.close();

     }

    public void actionPerformed(ActionEvent e) {
         System.out.println(e);
       // JOptionPane.showMessageDialog(rootPane, e.getActionCommand
());
       viewCdInfo(_currentRack.findCd(e.getActionCommand()));
     if(e.getActionCommand().equals("Exit")){

             writer();

             System.exit(0);

             }

     if (e.getActionCommand().equals("See All Cds Info")){
             System.out.println(e);
             printCdInfo(_currentRack.printCds());
     }

     if (e.getActionCommand().equals("Add a New CD")){
             System.out.println(e);
             addCd();
     }

     if (e.getActionCommand().equals("Remove CD(s)")){
             System.out.println(e);
             removeCd();
     }

    }
}

where do i write the throws exception command??

The method writer() throws IOExceptions.

void write() throws IOException {

and to add to this, your actionPerformed /must/ handle this exception (or writer
must handle it instead of throwing it). There is no mechanism within Swing for
an event handler to pass (throw) an exception back up the call stack.

--
Nigel Wade