All the colors of Java and so on

My friend Marc Godin sent me a link on a website publishing technical présentation videos. I'm sorry but you will probably have to stop watching Desperate Housewifes!

So, that's it :

http://www.parleys.com

Here is an article (in french about a project management approach). I just read a few words about it but it seems to be interesting. My opinion is that a project manager has to be a "real" member of his team and not upon it. When I was team leader, I tried to be like that : a "real" member. In fact, this project was good and work was efficient. It was a "real" team.

http://www.valtech-mag.com/mag/fr/1.html

Something interesting when you write a software is to translate it. Java has this feature embedded. You simply have to write properties files and use a resource bundle to extract texts in your program. Consult ResourceBundle class javadoc for more information about how to proceed.

Something else very ineresting in about properties file encoding. Java specification supposes this sort of files to be written in ISO-8859-1. Oops! What about translating my software into japaneese? No problem, you cas use "unicode" codes in your files.

For exemple, to translate é, replace it by \u00E9 in your properties file. You can consult www.encoding.org for more informations aboiut encodings.

Thus, if you want to retreive characters codes, I propose you think excellent web page (in french) :
http://hapax.qc.ca/conversion.fr.html

Something very boring : Microsoft Windows XP explorer inspects zip files. This could really decrease performaces.

So ...
If you want to turn of WindowsXP showing Zip files as folders,
just run:regsvr32 /u zipfldr.dll

http://www.defmacro.org/ramblings/fp.html

Thanks Marco!

Wow, that's my first message with year that I started with Luntbuild. I looked for an ognl expression to preform build only in a specific time range.

So, after reading the documentation and surfing on forums, I found the class OGNLHelper on Luntbuild CVS repository. Bingo!

Here is a exemple of a expression that returns true in a specific time range :
(system.getHour() in {0,1,2,3,4,5,6})

In this example, build will be done betwenn midnight and 6:00am.

Java application could be run on any compliant platform. And that's great. But, when you provide it to your customer, you don't know the region code of his server. For exemple, you don't know if is configured to work in english or french.

By the way, let's take the previous example. In franch, decimal separator char is ',' (comma). In english, it is '.' (dot). When prensenting data to end user, you probably want to ensure that the decimal separator char is the right. So, you can for it usiing DecimalFormat.

Let's see it in the following code :

public class AfficheurDecimal {

public AfficheurDecimal() {
testerReste(100);
testerReste(0);
testerReste(12354.12854);
}

private void testerReste(double reste) {
if (reste != 0) {
DecimalFormat formatEntier = new DecimalFormat("0.00");
DecimalFormatSymbols symbols = formatEntier.getDecimalFormatSymbols();
symbols.setDecimalSeparator(',');
formatEntier.setDecimalFormatSymbols(symbols);
String msg = "Il…

Today, my friend and excellent architect Marc Godin told me something very interesting that sumarize an illusion that java introduced with its virtual machine. He said :

"L'adhérence a la base de donnée est à acter comme celle à la JVM"

Sorry, it's in french. BTW, the text tells that you had to choose your database as you chose you JVM.

A good repository :

http://www.opensourcetesting.org

Something very usefull :

http://www.commentcamarche.net/html/htmlcarac.php3

Another excellent article by Brian Goetz on numerical java data type storing. It's just a question of IEEE 754. So, don't expect to work with primitive types in Java for finacial applications. Such a pity! My old Casio FX-7000 is more powerfull than my computer.

Financial programs represents a major part of softwares all over the world. If you want my opinion, its unacceptable to have to work with wrapped types!!!

James Goslin, any solution? You're welcome if you have one.

http://www-128.ibm.com/developerworks/java/library/j-jtp0114/

Great news,

I just learnt that Sun launched an open source ESB project with a tool suite for NetBeans. This fact of having developped graphical tools to design processes and mappings is a very (VERY) important point in my point of view. Something tells me that, if the product is well done, the situation will be harder for webMethods in several months.

I will publish my Violet UML Editor as quickly as possible to investigate on it.

http://www.netbeans.org/kb/55/bpel_gsg_project.html

http://open-esb.dev.java.net/

Just a list with Oracle error codes :

http://www.oracle.com/pls/db92/db92.error_search

Want to find files and perform massives operations on them, here are tws sample commands for unix platforms :

find -name "[filename]"

find -name "[filename]" -exec [command] '{}' \;

where [filename] and [command] should be replaced by real values. [command] is another unix command to execute on each file found. The file found is represented by '{}' in the command to execute. \; indicates to end of the command.

Ex : find -name "*.tmp" -exec rm '{}' \; -> deletes all tmp files.

cvs -d :pserver:[user]@[server]:/[repository] log -d ">2006-09-28" -w[user]

where
[user] is the username
[server] your server location
[repository] the CVS repositpry url

Of course, don't forget to change the date!

Here is a post I found on the hibernate forum. It explains why cursors opened are not released on session.close() :

OK. Here's the result of this thread:

For the environment, JDK1.4.2_01, Oracle 9i server, oracle 9i jdbc driver (ojdbc14.jar) and oci connection to the database (not thin driver);

There's no problem with hibernate's prep stmt cache nor with Oracle Jdbc driver with regard to cursors remaining open after Session.close().

Every Session.iterate() and Session.load() calls cause a prep stmt to be created on the server side. And after you close the session with Session.close(), hibernate explicitly calls appropriate driver methods to close the resultsets and prepared statements.

However, after you close the session, you won't see the cursors de-allocated (or closed) on the server side. While it seems to be a bug, it actually is not. The driver maintains a list of prep statements and open cursors in its memory and as soon as you re-use the same connection by opening …

Just to remember... nothing more :

byteShort numerical from -128 to +1271 byteshortShort numerical from -32768 to +327672 bytesintNumerical from -2 147 483 648 to +2 147 483 6474 byteslongLong numerical from -263 to +263 -18 bytesfloatDecimal from -1.4 * 10-45 to +3.4 * 10384 bytesdoubleLong decimal from 4.9 * 10-324 to +1.7 * 103088 bytescharUnicode character (65536 possible characters)2 bytesbooleanBoolean (true or false)1 byte

One of the greats features offered by Java is its capability to switch in full screen mode. The following article is a sun's tutorial on this subject :

http://java.sun.com/docs/books/tutorial/extra/fullscreen/index.html

To illustrate how it is benefit to use this mode, I want to opposite it to web based applications that impose the display of unusefull navigator toolbars (taking 25% of the screen workspace).

I will implement full screen mode in Violet UML Editor.

when I was young, I developped on webMethods platform. Since this périod, I feel that writing java code is a prehistoric way of programming.

http://www.ebizq.net/

Here is a good article flying over tools that are usefull to monitor JVM 1.6 :

http://java.sun.com/developer/technicalArticles/J2SE/monitoring/