At the risk of spoiling everybody's fun, I'd just like to point out that
you're asking for trouble by not specifying a full path for a file.
I don't believe there are actual requirements (in either Java or
Web-Container terms) for what should be considered the default directory
when one isn't specified - so you're just going on empirical results here
(which are probably system specific too).
I think I've found in the past that the default directory changes to be
whichever one you last accessed a file from, which can obviously cause
problems even if you're not looking for portability....
In short: you ought to specify the full path.
Mike.
----- Original Message -----
From: "Stratmann, Holger" <[EMAIL PROTECTED]>
To: "'Tomcat Users List'" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Wednesday, January 15, 2003 12:50 PM
Subject: AW: saving and opening files
> Hi - just tried your suggestion and it returns:
> I'm file2 and I am at C:\Program Files\Apache Group\Tomcat
> 4.1\states.gip
> - and guess what, it is not there!Any other ideas? ;-)
Well... that's the point where it's getting "weird".
I'm quite confident that my answer was the correct one - if the file gives
you its absolute path, then that's where it should be (and on top of that,
it's in the directory from which the JVM was started, as I had expected).
I'm sure this will turn out to be some "funny" thing ;-)
I'm sure you've already searched the entire C-drive for it?
Try if Java finds it:
File file2 = new java.io.File("states.gip");
String path = file2.getAbsolutePath();
File testfile = new File(path);
if (testfile.exists()) {
System.out.println("file found at " + path);
} else {
System.out.println("file was supposed to be at " + path + " but
isn't!");
}
If this code finds your file, then don't tell me it's not there :-)))))
Just go look again and again and again ;-)
By the way:
* "exists()" is a better way of checking for a file than catching the
exception...
* FileInputStream() doesn't need a file, it's also happy with a path:
As soon as you've found out where the file is *g*, you can simplify it to
be:
ObjectInputStream s1 = new ObjectInputStream(new
FileInputStream("states.gip"));
Looking forward to the solution for this one :-)
Holger
> -----Urspr�ngliche Nachricht-----
> Von: Clive De Silva [mailto:[EMAIL PROTECTED]]
> Gesendet: Dienstag, 14. Januar 2003 23:36
> An: Julius Davies; Tomcat Users List
> Betreff: Re: saving and opening files
>
>
> Hi - just tried your suggestion and it returns:
> I'm file2 and I am at C:\Program Files\Apache Group\Tomcat
> 4.1\states.gip
> - and guess what, it is not there!Any other ideas? ;-)
>
> Clive
>
> Von: Stratmann, Holger [mailto:[EMAIL PROTECTED]]
> Gesendet: Dienstag, 14. Januar 2003 11:33
> An: 'Tomcat Users List'
> Cc: Julius Davies
> Betreff: AW: saving and opening files
>
>
> I *think* a file with a relative path is usually put into the
> directory from
> which the JVM is started.
> (that's what I've found so far - don't know if it's *always* true)
>
> Well, anyway: "File" has a method "getAbsolutePath()" (or
> something like
> that).
>
> Just let the file tell you where it is :-)
>
> File file2 = new java.io.File("states.gip");
> System.out.println("I'm file2 and I am at " +
> file2.getAbsolutePath());
>
> HTH - Good luck!
>
>
>
>
> > -----Original Message-----
> > From: Clive De Silva [mailto:[EMAIL PROTECTED]]
> > Sent: Monday, January 13, 2003 3:48 PM
> > To: [EMAIL PROTECTED]
> > Subject: saving and opening files
> >
> >
> > Hi, I have placed my package in the \Apache Group\Tomcat
> > 4.1\common\classes\ folder and they are all standard Java
> > classes [no servlets or jsps]. One of the methods invoked in
> > my main class serializes an object and saves it to a
> > persistent file at runtime :
> >
> > ---------------------Start Snip 1-----------------------
> > public boolean saveUser(){
> > File file2 = new java.io.File("states.gip");
> > try{
> > myUser.allocateUser(user);
> > FileOutputStream out2 = new FileOutputStream(file2);
> > ObjectOutputStream s2 = new ObjectOutputStream(out2);
> > s2.writeObject(myUser);
> > s2.flush();
> > System.out.println("You have save successfully");
> > return true;
> > }
> > catch(Exception e){
> > e.printStackTrace();
> > System.out.println("You have save UN-Successfully");
> > return false;
> > }
> > }
> > ---------------------End Snip 1-----------------------
> >
> > When the class is initialised/created, it first checks to see
> > if there is a file called states.gip and if there is, then it
> > reads in the object, if there isnt, then it creates an object
> > and at a latter stage saves it:
> >
> > ---------------------Start Snip 2-----------------------
> > public boolean createUser(String name){
> > try{//see if a user had been created and try to load it back
> > File file2 = new java.io.File("states.gip");
> > FileInputStream in = new FileInputStream(file2);
> > ObjectInputStream s1 = new ObjectInputStream(in);
> > myUser = (MainUser)s1.readObject();
> > user = recommenderEPG.addUser(name);
> > user = myUser.unallocate(user);
> > System.out.println("There was an old user!");
> > return true;
> > }
> > catch(Exception e){//user has not been created so an
> > exception is thrown -going to create a new user
> > try{
> > myUser = new MainUser(name);
> > user = recommenderEPG.addUser(name);
> > myUser.allocateUser(user);
> > System.out.println("there is definitely no old user");
> > return true;
> > }
> > catch (DataNotFoundException ef){
> > return false;
> > }
> > }
> > ---------------------End Snip 2-----------------------
> >
> > When the class does get created for the first time, it does
> > not see the 'states.gip' file, which is correct, because it
> > has not been created yet. If it is instantiated for a second
> > or nth time, it always sees the file and loads it correctly.
> > My Question is: where is this file stored? I can not find a
> > physical trace of this file - i have done search after search
> > and it is not there - yet the Java class opens it
> correcly!!!!! Help!
> >
> >
> > Regards,
> >
> > Clive
> >
> >
> > ---
> > Outgoing mail is certified Virus Free.
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.435 / Virus Database: 244 - Release Date: 30/12/2002
> >
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.435 / Virus Database: 244 - Release Date: 30/12/2002
>
>
> --
> To unsubscribe, e-mail:
> <mailto:[EMAIL PROTECTED]>
> For additional commands, e-mail:
> <mailto:[EMAIL PROTECTED]>
>
--
To unsubscribe, e-mail:
<mailto:[EMAIL PROTECTED]>
For additional commands, e-mail:
<mailto:[EMAIL PROTECTED]>
--
To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]>
For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
