Java

Re: NEED HELP REGARDING EMBEDDING THE CHAT SERVER I MADE ON MY WEBSITE TO SERVE AS LIVE CHAT.

6-Jul-11 3:26

Member 8011053 wrote:
i guess i need to make jsp and servlets..for that i need guidance that how to do that.

There is no simple one line answer to this question. If you do not have any experience in these technologies then you are not going to be able to complete this project easily. There are many samples around the internet and, once again, I suggest you go and research some of them.

The best things in life are not things.

Member 80110536-Jul-11 3:31

Member 8011053

6-Jul-11 3:31

thankyou for your advices , i have 1 month with me so i will try my best.

Re: NEED HELP REGARDING EMBEDDING THE CHAT SERVER I MADE ON MY WEBSITE TO SERVE AS LIVE CHAT.

TorstenH.6-Jul-11 0:50

Re: NEED HELP REGARDING EMBEDDING THE CHAT SERVER I MADE ON MY WEBSITE TO SERVE AS LIVE CHAT.

6-Jul-11 0:50

so you have developed a chat server, eh?

smells like homework.
What part of the client do you've got yet?

regards Torsten
I never finish anyth...

Member 80110536-Jul-11 2:58

Member 8011053

6-Jul-11 2:58

i have modified the information and stated more clearly that i want..please have a look and reply ,
thankyou Smile | :)

try block problem in java..

gateway235-Jul-11 20:58

gateway23

5-Jul-11 20:58

sir/mam

i want to know if i can put the try block directly in a class... as

class a
{
try
{

methods;

}
catch()
{ }
}

Cedric Moonen5-Jul-11 21:39

Cedric Moonen

5-Jul-11 21:39

No, a try/catch block has to be inside a method.

What are you trying to achieve exactly ?

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

gateway235-Jul-11 22:12

gateway23

5-Jul-11 22:12

thanks cedric for your reply.

If you don't mind can you please explain why we can't put the try/catch block directly in a class.
why it is required to put it in a method.

Cedric Moonen5-Jul-11 22:35

Cedric Moonen

5-Jul-11 22:35

For the same reason why you can't put code directly in a class: it is by design. If you would be able to put code directly in your class (not in a method), what would that mean ?

A try/catch block is meant to surround code that could potentially fail. If you put it directly in a class, it doesn't surround any code.

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

David Skelly6-Jul-11 3:47

David Skelly

6-Jul-11 3:47

Cedric Moonen wrote:
If you would be able to put code directly in your class (not in a method), what would that mean ?

That it was static.

class MyClass {

  {
    System.out.println("This is a static code block");
  }

}

Hopefully no-one will actually write a class like that minimalist example, but static code blocks are there for a reason and can be useful under certain circumstances.

TorstenH.6-Jul-11 3:52

6-Jul-11 3:52

David Skelly wrote:
under certain circumstances.

...under very certain circumstances.

I've just cleaned out that stuff out of one of my projects here. A former student used to make (like?) such crucial stuff.

regards Torsten
I never finish anyth...

David Skelly6-Jul-11 5:06

David Skelly

6-Jul-11 5:06

I once saw world war III break out over the rights and wrongs of static code blocks between an ex-Smalltalk OO purist and an ex-C++ hacker. No quarter asked or given on either side.

It's like anything: give someone a hammer and they will find a way to hit themselves on the head with it.

Richard MacCutchan5-Jul-11 22:40

5-Jul-11 22:40

The try{}catch{} mechanism is specifically for catching exceptions thrown within a block of code, i.e inside a method. Putting such a mechanism in a class has no meaning as it includes things like variable definitions, overloaded methods etc.

The best things in life are not things.

gateway235-Jul-11 23:14

gateway23

5-Jul-11 23:14

Thanks cedric and richrd.
you solve my problem.
thanks a lot.... Smile | :)

Get values from cookies4.dat (a file of Opera browser)

Shameel7-Jul-11 3:15

Shameel

7-Jul-11 3:15

The code you write inside a class are NOT "executable", they're just declarations like variables and methods. The try {} catch {} block is designed to trap errors in executable code. Since only methods contain executable code, try {} catch {} can be placed inside methods only.

CodeGust5-Jul-11 16:54

CodeGust

5-Jul-11 16:54

Hello,

My application needs to directly read cookies data from cookies4.dat file that is a cookies firl for Opera browser.
When I load the cookies file of opera it gives me a lot of noise. Here's the <a href="http://img840.imageshack.us/img840/7509/63274022.png">screenshot</a>.

How can I extract(/parse) values for each cookie from that .dat file?
Thanks.

Re: Get values from cookies4.dat (a file of Opera browser)

TorstenH.5-Jul-11 21:08

Re: Get values from cookies4.dat (a file of Opera browser)

5-Jul-11 21:08

Just a brief guess - the file ends on *.dat.
For some strange circumstances a *.dat file is a binary file without any specific associated format.
so you've got to give that data some meaning.

You should take a look in the documentation. There you'll find some info on Opera Cookie File Format[^].

regards Torsten
I never finish anyth...

CodeGust6-Jul-11 7:25

CodeGust

6-Jul-11 7:25

Thank you. Actually, the problem is that I don't know how to read(/parse/extract values from) that Opera Cookie File Format.

Re: Get values from cookies4.dat (a file of Opera browser)

TorstenH.7-Jul-11 19:41

Re: show database in java ??

7-Jul-11 19:41

I don't know ether.

It's a *.dat file - that one is not really specified.
You could start here: http://www.willamette.edu/~gorr/classes/cs231/lectures/chapter11/[^]

and try that. But I doubt to get human readable stuff.

For exact information you'd have to ask the Opera Developer Base[^]

regards Torsten
I never finish anyth...

show database in java ??

kellyyy1-Jul-11 18:01

kellyyy

1-Jul-11 18:01

hello every body...

may ,, i want to ask ,how do know the amount of content in the database and display at textfield ?

sorry my language not good

Richard MacCutchan1-Jul-11 22:19

Re: show database in java ??

1-Jul-11 22:19

What do you mean by "the amount of content"; the number of tables, records, columns, bytes etc?

The best things in life are not things.

jschell4-Jul-11 7:07

jschell

4-Jul-11 7:07

kellyyy wrote:
how do know the amount of content in the database and display at textfield ?

Steps
1. Learn basic java
2. Learn about GUI programming in java.
3. Learn basic database including SQL. This has nothing to do with steps 1/2.
4. Learn JDBC. This is an API in java. Do NOT attempt this before steps 1 and 3.
5. Put the above together to create a program that does what you want.

Show FireFox cookies with Java [modified]

CodeGust29-Jun-11 8:40

CodeGust

29-Jun-11 8:40

I am writing a java applet that shows FireFox cookies. Is it possible to open the cookies.sqlite file and read that database in Java?

I tried with org.sqlite.JDBC driver but without success. And got exception: file is encrypted or is not a database.
Is it necessary to decrypt the file first or get a permission?
I tried SqlJetDb and it gives exception "org.tmatesoft.sqljet.core.SqlJetException: NOTADB: error code is NOTADB"

Is there anything else do the task of showing FireFox5 cookies?
Thanks.

-- Modified Wednesday, June 29, 2011 8:07 PM

Re: Show FireFox cookies with Java

Richard MacCutchan29-Jun-11 21:42

Re: Show FireFox cookies with Java

29-Jun-11 21:42

You could try some of these suggestions[^].

The best things in life are not things.

TorstenH.30-Jun-11 3:51