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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.
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ok thankyou for your advices , i have 1 month with me so i will try my best.
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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...
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i have modified the information and stated more clearly that i want..please have a look and reply ,
thankyou
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sir/mam
i want to know if i can put the try block directly in a class... as
class a
{
try
{
methods;
}
catch()
{ }
}
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No, a try/catch block has to be inside a method.
What are you trying to achieve exactly ?
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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.
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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.
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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.
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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...
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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.
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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.
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Thanks cedric and richrd.
you solve my problem.
thanks a lot....
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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.
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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.
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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...
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Thank you. Actually, the problem is that I don't know how to read(/parse/extract values from) that Opera Cookie File Format.
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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
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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.
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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.
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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
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Hi,
I'm usually programming in .net but now I have to do a project in java. Nothing wrong with it, but Eclipse demands try/catch blocks on sortof every call which might pose a problem, even if I have error handling in place. How do I get rid of that? I just need a quick check for something, but it even prevents me to compile it.
private void doSomething()
{
Properties properties = readProperties(chooser.getSelectedFile().getCanonicalPath()); <--- compile error
}
private void readProperties(String location)
{
}
While the location of my errorhandling might be debatable, this is for a proof of concept app where I *know* the input is correct.
A good programmer is someone who always looks both ways before crossing a one-way street. (Doug Linder)
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