nICE tO lEARN

EJB 3.1 automatic timer does not work for second

2011-12-22T10:00:00.000+08:00

When I tried the tutorial to create timer service using EJB this morning, I found out the @Schedule annotation for second does not work as what it suppose to be (print a message every second), keep trying .... trying.....
End up, the "reason" give me a BIG Ooooooooooo .....

What I did

@Singleton
public class ScheduleBean {

    @Schedule(second = "*/1")
    public void doWork() {
        System.out.println("Hello dude... schedule is working...");
    }
}

What it suppose to be

@Singleton
public class ScheduleBean {

    @Schedule(second = "*/1", minute = "*", hour = "*")
    public void doWork() {
        System.out.println("Hello dude... schedule is working...");
    }
}

Run Live mMessenger / MSN Without Installation

2011-05-16T09:39:00.008+08:00

As my current company not allow live messenger to be install in working box, so I have created this simple vb script to use live messenger, if you interested to do so, follow steps below :)

Create an empty file with file extention .vbs (eg : msn.vbs) .
Open the file in notepad or any other text editor.
Paste code below into the file.

Set WshShell = CreateObject("WScript.Shell")
Set iexplore = CreateObject("InternetExplorer.Application")
iexplore.navigate "http://home.live.com/Handlers/WebIM.mvc"
iexplore.toolBar = false
iexplore.addressBar = false
iexplore.menuBar = false
iexplore.width = 600
iexplore.height = 750
iexplore.visible=true

Save the file and double click to run.

Software Development Should Fly !

2011-02-08T12:24:00.000+08:00

After 5 years working in software industry, from small to giant company, from stand alone application to e-commerce site, I do notice those project have similarity from management perspective no matter what they are building, how big the project scope, how big the team size was and of course, what development methodology they are using.

I still remember quite sometimes ago, a colleague of mine (who believe in certification does make manager good in management) like to told me, who and who is PMP (Project Management Professional) certified, who and who is xxxx certified so on, and normally I will just reply as : “oh.... okie, nice to hear that, hope this manager is different”.

I reply so doesn't means I don't believe in certification, contrary, I do believes if you holding a industry recognized certification meaning you have attend proper course, assignment and you have learn what and how is the correct way to manage project. But the sad thing is "ideals life is most of the time crash with reality", if you don't have the core problem resolve.

Of course, project management is always not an easy job especially when you want to make everyone happy (Customer happy when they see what they want, developer happy when work life balance, company happy when they have profit). But how hard could it be if you really follow the principal of project triangle below?

Every project's core is the trio of time, money and scope, and these are the factors you juggle every day to keep your project plan on track. If you adjust any one side of the triangle, the other two sides are affected.

For example, if you decide to adjust the project plan to:

Bring in the scheduled finish date, you might end up with increased cost and a decreased scope
Meet the project budget, the result might be a longer schedule and a decreased scope
Increase scope, your project might take more time and cost more money in the form of resources, such as workers.

Quality is at the centre of the project triangle. Quality affects every side of the triangle, and any changes you make to any side of the triangle are likely to affect quality. Quality is not a factor of the triangle; it is a result of what you do with time, money, and scope.

As it is easy to explain how project triangle works, but unfortunately, it's always hard to follow in real life project management because most of project will have limited time, low budget and big scope, which cost low quality software.

References:

http://office.microsoft.com/en-us/project-help/every-project-plan-is-a-triangle-HA001021180.aspx

How JVM Garbage Collection Works

2011-01-31T16:26:00.004+08:00

There are two main areas of memory in the JVM – the ‘Heap’ and the ‘Permanent Generation.’ In the diagram above, the permanent generation is shown in green. The remainder (to the left) is the heap...

Read here to know more.

[Image and resource are from redstack.wordpress.com]

EBooks Collection for Java J2EE

2011-01-06T20:43:00.002+08:00

Click here to download.

(Source from TheServerSite.com)

Downgrade iOS Firmware

2010-10-30T12:14:00.003+08:00

Download version of restore file here.
Goto Windows --> Run, type in "notepad C:\Windows\System32\drivers\etc\hosts", it brings up host file (Google yourself for how to edit hosts file for Mac user).
Goto last line of file and add in "74.208.10.249 gs.apple.com".
Switch off your iPhone/iPod.
Press the Home button and connect your device to PC, the devices boots up and "Connect To iTunes" screen displayed.
Launch iTunes, and you will see it detected your devices in recovery/restore mode, press the "Shift" key (For Windows) or Alt key (for Mac) on keyboard while click on "Restore" button in iTunes (This will open a windows browser).
Browse to your restore file (iPodxxxxx_Restore.ipsw) and click Restore.

Confuse with Unicode, UTF-8, UTF-16, GB2312, BIG5 etc ?

2010-05-17T13:41:00.002+08:00

Read this article wrote by Joel Spolsky.

James Gosling resign from Oracle

2010-04-12T16:09:00.003+08:00

Father of Java - James Gosling has resign from Oracle on April 2010 as he announce @ his own blog. In these recent years, there are lot of acquisition has done by giant software company, and Sun Microsystem is one of the deal who acquired by Oracle in January 2010. I think I have to add in these 2 big event happened to Java History since I have just post it until 2006 :)

Free Struts book

2010-03-31T11:13:00.003+08:00

Jakarta Struts Live is free for download.

Memory card being lock after firmware upgrade for my nokia E-71

2010-03-29T11:59:00.003+08:00

When the time I happily restart my phone after upgrade my Nokia phone firmware to the latest version this morning, the bad mood comes to me. My phone asking me to enter password when I insert my memory card which I removed before upgrading process take in place. I Enter "1111"... "Incorrect password", then I continue to try those common password like "1234", "0000".... "Incorrect password" AGAIN!!! "Suckssss"... ALL MY DATA GONE!!! my message..., my video..., my image..., my files..., my applications... Ooooooooo Nooooooooooo.... I was so frustrated after all these happy mood turn to sad, so, I google around for any solution from others which might help :( try .. try.. and try... Huh.. not so bad, finally there is a post from Nokia forum asking to try enter the the "Remote lock message" for the phone which normally happen to be under menu: Tools | Settings | Security | Phone and SIM | Allow remote lock menu. Then the password of the memory card will be the remote lock message. I tried enter "xxxxxxxx" ...... Bravo !!! it works for me :) thanks to all the article contributors, you guys save my life :) Note : Since memory card password is restricted to only 8 digits, the first 8 digit from remote lock message is assigned for memory card. For example if Remote card message is : "locknokia71" then your password for memory card will be "locknoki"

Configure Static IP for OpenSolaris

2010-03-09T22:00:00.009+08:00

Follow step below:

svcadm disable network/physical:nwam (Execute in terminal)
svcadm enable network/physical:default (Execute in terminal)
cp /etc/nsswitch.dns /etc/nsswitch.conf
Put DNS in /etc/resolv.conf ( eg: nameserver 192.168.0.9)
Put the default router(gateway) ip into /etc/defaultrouter (eg:192.168.0.1)
If your Ethernet interface name is rtls0, create /etc/hostname.rtls0, and put two lines as below: eg: line 1: 192.168.0.199 (the static IP you want) line 2: netmask 255.255.255.0 broadcast + up
Restart Machine

Good bye, Sun.com

2010-01-29T17:12:00.006+08:00

Skype for Nokia Symbian phone

2009-12-11T15:27:00.002+08:00

Wow! finally Skype for Nokia Symbian phone has launch. Click here to check the supported phone version and download it!

Windows Live Messenger offline installer

2009-11-03T16:46:00.001+08:00

Here your go.

Prevent SQL Injection

2009-10-08T09:42:00.001+08:00

Here are few tips for the matter.

A Brief History of Java and JDBC

2009-08-26T09:34:00.002+08:00

Wi-Fi network are not secure

2009-08-24T16:06:00.002+08:00

Wi-Fi may not in itself be insecure, but various implementations of the wireless technology are. The most vulnerable of these are "open" networks, which don't even require a password or network key to use. Unfortunately, open networks are common; indeed, most of the free networks you encounter in coffee shops, hotel lobbies, and other public spaces fall into this category. Whenever you use an open network, the information you send and receive is exposed for all to see. And there are plenty of nasty types lurking around who want to see it. They are looking for confidential information in your e-mails, SMS messages, and other Web communications that would enable them to steal your passwords, personal identity, and money. Stealing information from traffic on an open Wi-Fi network is relatively easy. You don't have to be a technical expert or hacker because there is a wide range of tools available for download that allow just about anyone to tune into and record other people's communications. One such program is the free Wireshark utility, which Ryan Russell described in his Mar. 20 Perimeter Scan column. Hey, there's even a YouTube video showing how to do it. So the next time you're considering using an open network, remember that the person at the next table or in the next room may be listening in. If that thought makes you uncomfortable, here are some things you can do to prevent being a wireless victim. Read full article by Ian "Gizmo" Richards

Change struts2 .action suffix

2009-07-16T10:59:00.021+08:00

Just found this works when you want to change the suffix for struts2 framework from dot action(.action) to some other suffix like for eg: dot htm (.htm) 1. You will have web.xml as below:


 struts2
 org.apache.struts2.dispatcher.FilterDispatcher



 struts2
 /*

2. Add below line of code to override "struts.action.extension" value in struts.xml

OR Create struts.properties file and place along with struts.xml or in other folder but don't forget to set a classpath for it if you put this file into other folder, the code in properties file will be as below:

struts.action.extension=htm

Note: This action just override the extension value which use by DefaultActionMapper in struts2 as ".action" when we extend "struts-default" interceptor. Refer here for more struts2 constant configuration.

Unable to install Live Messenger in Windows XP box

2009-07-03T09:44:00.003+08:00

The application failed to initialize properly (0xc0150004). Click OK to terminate the application This error frustrated me when I try to install Windows Live Messenger version 2009 in my XP box. After googling for sometime, those information doesn't help much, as I try to uninstall windows messenger, install dot net framework etc. When the time i suspect it might be affected by virus or due to hardware problem, I try to update my Windows XP services pack from default services pack 2 to services pack 3, guess what..... Hurray !!! it works now :) p/s: Try to update your services pack when you face above problem during install Live Messenger

Search video in bing

2009-06-18T14:33:00.005+08:00

As one of previous post from mine regarding new search engine calling itself 'bing' from Microsoft, here come with a small tips for those who might wonder it has video search capability as other search engine did, but this function is currently available in US country only. Anyway, here you go to search 'bing' video by changing your default country to US(English) as below: You will get this:

funny, but true in most case

2009-06-10T18:18:00.001+08:00

Another search engine for your choice

2009-06-05T15:08:00.004+08:00

Here come with another favor of search engine by Microsoft after Live search, name 'bing' , which Microsoft is calling Decision Engine and I think it is real competitor to Google search, try it out @ http://www.bing.com.

Free Reminder - launch

2009-04-22T17:46:00.004+08:00

After complete the first version of the reminder as mention @ my previous blog. we decided to open source it after short discussion with my guru, and the source code are under Subversion control, so if you want to checkout the source code, just do: svn co http://jvege-reminder.googlecode.com/svn/trunk/ jvege-reminder-read-only. or just try to use it if you interested to by single click here or mirror link here. p/s : Thanks Steven(my guru) to prepare the environment @ google code directory, and also suggestion given to make it open source :)

Extend jnlp signer certificate life

2009-04-14T15:30:00.012+08:00

Netbeans will generate a signer certificate which life for six months (based on output warning it prompt: The signer certificate will expire within six months), anyway, there are ways to extend it either by signing your jar file using java keytools (tutorial available here), or change the configuration in jnlp.impl.xml file which generate automatically by Netbeans IDE when you build your project by "Enable Web Start" checked. Here you go: 1. Look for the genkey node. 2. Add validity value into genkey node, for eg: genkey validity="365" means 365 days. 3. Clean and rebuild your project in Netbeans.

All in one IM tool

2009-03-30T16:36:00.002+08:00

If you are personally holding many IM / Social network account and frustrate signing in one by one everyday, here are 2 tools recommended to you as below: 1. Nimbuzz 2. Digsby I personally choose Nimbuzz because it support Skype account and most importantly it compatible with my mobile phone, so that, I'm able to treat my phone as Skype phone too :) The bad things for these 2 IM tools are: 1. They mostly text and minor emoticon. 2. They have no Winks like what's in Live Messenger, shower smiley face in AIM. 3. ...

Nokia phone still works after week inside a fish

2009-03-09T22:09:00.000+08:00

When it comes to losing your cell phone in the sea, you expect it to be buried there. You certain don't expect it to turn up a week later inside a fish. And you most definitely don't expect it to still be working. Read full story here

Netbeans Ant task default compiler

2009-02-18T18:32:00.008+08:00

Just beware when you compile your application using your own customize build file in netbeans(Ant task). Ant task compile your source using jdk which sit as default jdk in your netbeans platform manager, not the jdk set in your project properties. To force ant task compile source using your preferred compiler, there are 2 way I found as below :

Change your netbeans default jdk (if there is more than 1 jdk present in your netbeans platform manager) Change the value of netbeans_jdkhome to your intention jdk home in netbeans.conf which locate in <NETBEANS_HOME>\etc\ folder. eg : netbeans_jdkhome="C:\Java\bea\jdk150_12"

Set the executable and fork attribute in your Ant task (your customize build file). eg :

<javac srcdir=""
 destdir=""
 executable="path-to-java14-home/bin/javac"
  fork="true"
 taskname="javac1.4" />

10 Privacy Settings Every Facebook User Should Know

2009-02-17T10:14:00.003+08:00

Helpful tips for all Facebooker, read here for more.

Gmail offline

2009-02-04T09:58:00.002+08:00

Now, you are able to access your Gmail without internet connection. Click here to know more.

Great working environment

2009-01-16T14:01:00.001+08:00

Wow!! getting shock when viewing their working environment. Food, drinks, games, massage chair, table tennis............. It looks like entertainment center more than a working place, but that is real!!! That "entertainment center" is a place where they create great products, which use world widely.

Click here for more photo available

Free Reminder - coming soon!

2009-01-16T11:24:00.001+08:00

Gmail Drive

2009-01-03T21:02:00.003+08:00

Need a free network drive? try this, it use Gmail account as your file storage.

When you start getting in-page errors on your hard drive, it's time to go shopping for a new hard drive

2008-12-30T14:24:00.001+08:00

The STATUS_IN_PAGE_ERROR describes itself as "The instruction at XXX referenced memory at YYY. The required data was not placed into memory because of an I/O error status of ZZZ." What does this mean? Raymond explain these in his blog.

New Desktop Search

2008-12-24T12:13:00.003+08:00

If you think Windows search is slow, Google desktop search is heavy, try this, Everything search engine.

Cell phone industry celebrates its 25th birthday

2008-10-15T12:42:00.002+08:00

Mobile phone industry celebrating it's 25 years old birthday, from Motorola "Brick" to Nokia, SonyEricsson, or even more advance iPhone.

Remember VSS password

2008-10-06T16:14:00.003+08:00

For those who are lazy to retype vss user name and password every time it get launch, step below might help you up. 1. Go to Control Panel --> System 2. Click on "Environment Variable" in Advance tab. 3. Create user variable name as SSUSER then add variable value as your vss user name. 4. Create user variable name as SSPWD then add variable value as your vss password. 5. Click OK to exit all panel. 6. Done

Less size, Save loading time

2008-10-06T09:55:00.005+08:00

To make your page load faster by squeeze image file to decrease file size? Here is the web tool might help you up. This image optimization tool able to squeeze your image file without changing their look or visual quality.

Virtual Desktops

2008-09-22T09:28:00.000+08:00

We might found it annoying when messenger alert blinks during we are concentrate on some serious task, here is the tools might help you in this scenario. Desktops allow you to create up to 4 virtual desktops which in this case you can separate your desktop with your task and messenger, so you won't be annoy by the alert while you are concentrate on some task, but you can still keep contact with your buddy by switching your virtual desktop with another.

谷歌金山词霸

2008-07-21T10:39:00.004+08:00

This software published by Google and Kingsoft, it's an online translation dictionary. Functionality include : Chinese --> English , English --> Chinese translation， pronunciation, example etc. This is recommended for people who are type of lazy learner. (Because it provide mouse over translation). Most importantly, it's freeware. Click here or title for product homepage

Simple Swing Google Search

2008-07-07T09:59:00.003+08:00

Actually this is an assignment by my "sifu" -- swing based google search which involve java swing and API provided by google to exposes a raw RESTful interface that returns JSON encoded results. Try access it here and do search anything like using google websearch, double click the result list will get you to the url. Have fun!! Note: It return lesser result compare google websearch, I'm still looking the solution, kindly drop me a comment if you know it :)

Setup did not find any hard disk drives installed in your computer

2008-05-01T07:32:00.000+08:00

I face above problem this morning when trying to install Windows XP on my friend's notebook,
ops, "hard drive corrupt!", that is my first impression, but, it just seems like the same problem I try to install on my cousin's notebook last month, but I just told him his hard drive was corrupted, and ask him to replace a new one at that moment, sigh... sorry dude.
Anyway, forgot the experience, and I would like to thanks the owner from this post, because I got the solution from it.
Actually the solution is quite simple, just change the SATA mode from XXXX to IDE from BIOS setting, or another solution will be install your SATA RAID driver get from manufacture, that's it!

Thread safe servlet

2008-04-16T16:11:00.003+08:00

Just half way reading a book, and found something is important in order to create a thread safe servlet, few attribute and variable must be synchronized as below:

Context Scope Attribute
Session Scope Attribute
Instance Variable
Static Variable/Class Variable

Disable create a war/jar file in Netbeans6

2008-02-27T15:21:00.009+08:00

To disable generation of a WAR file for a project: 1 . In the Files window, open your project folder and open build.xml. 2 . Override the do-dist target to have no contents and no dependencies. For example, add the following to build.xml: <target name="do-dist"/> To disable generation of a JAR file for a project: 1 . In the Files window, open your project folder and open build.xml. 2 . Override the jar target to have no contents and no dependencies. For example, add the following to build.xml: <target name="jar"/> *Information is getting from Netbeans help file.

Fedora core 8 - Twin View/DualScreen

2008-01-14T15:16:00.000+08:00

Wow, desktop extended, can have more icon to put, can manipulate files at *large* screen...

1) open a terminal, type xrandr to check your display configuration, see image below:

NOTE : based on the result, maximum resolution to display = 2048 x 768 and 2 output is currently connected, which is VGA-0 and DVI-0, ok, note it down, it's needed to edit xorg.conf file.

2) create a copy of /etc/X11/xorg.conf as xorg.conf.ori for backup purposes.

3) edit xorg.conf as example below :

# Xorg configuration created by pyxf86config

Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us+inet"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "FLATRON 775FT"
HorizSync 31.5 - 61.0
VertRefresh 50.0 - 75.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "Monitor1"
VendorName "Monitor Vendor"
ModelName "FLATRON 775FT"
HorizSync 31.5 - 61.0
VertRefresh 50.0 - 75.0
Option "RightOf" "Monitor0"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "radeon"
Option "Monitor-VGA-0" "Monitor0"
Option "Monitor-DVI-0" "Monitor1"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Virtual 2048 768
Depth 24
Modes "1024x768"
EndSubSection
EndSection

# End Xorg configuration created by pyxf86config

4) Few thing here you need to aware of (for those keyword in red colour), and need to change accordingly your hardware:

RightOf - its a identifier which determine where your 2nd screen to display, other usable keywords are , "LeftOf" , "Above", "Below". In this case: monitor1 is RightOf monitor0
VGA-0 and DVI-0 - there are output connected to your monitor.
2048 768 - It is maximum resolution for your Virtual configuration.

P/S : From my understanding after doing these, I think we just created a virtual screen which has big resolution(2048x768) and so, we can view it as twin screen as both screen will get 1024x768 individually.
Please correct me, if I'm wrong :)

NetBeans 6 java.lang.ClassCastException

2007-12-04T13:54:00.001+08:00

Wow, Netbeans6 IDE is finally out! After download here.. installed, happily run the cool IDE with newly added features.... opps..... exception occur as :

java.lang.ClassCastException: org.openide.filesystems.MultiFileObject$VoidValue cannot be cast to java.lang.Stringat org.netbeans.modules.editor.settings.storage.EditorSettingsImpl.getCurrentFontColorProfile
(EditorSettingsImpl.java:233)

xxxxxxxxxxxxxxxxxxxxxxx

After playing around with those settings file located at home directory as .netbeans folder, I found that, when user trying to import setting from their previous settings created by older version of Netbeans will hit such error (I use Netbeans 5.5) in their first run.

Okie, here come with solution:

Delete folder created/imported when first run in %HOMEDIR%/.netbeans/6.0.
Run Netbeans again, then choose not to import settings created by previous version of Netbeans

p/s : I don't know why this senario happen in Netbeans6, as I just try out this, if you know why or have better way to solve this, please help to comment here.

Overclock is just nice

2007-11-18T12:33:00.000+08:00

Specification:

Intel Pentium 4 2.0 / 512/400 / 1.5v
Abit It-7 Max2
1 Gb Ram

Original vs Overclock

Original

Overclock

Original

Overclock

Original

Overclock

What I did is change some simple Bios config as below:

Ext. Clock(CPU/AGP/PCI): 131/64/32
PCI Bus Frequency: Ext.Clock/4
Multiplier Factor: x20
DRAM Ratio H/W Strap: High
DRAM Ratio (CPU:DRAM): 4:5
Core Voltage: 1.55v
DRAM Voltage 2.6v

Note: I tried to increase external clock to more than 131Mhz and of cause vcore voltage, but i found that, system just not stabil when exceed that range, eg: network not able to connect, cannot remote desktop... etc (no idea why it happen), anyway, The mportant part is, the temperature won't go too high(around 60-65 'C) due to low vcore after overclocking.

p/s: Even my system is running in overclock mode, but is was hard rock stabil !!

DOHC vs SOHC

2007-11-18T12:28:00.000+08:00

SOHC

Refer to Single Overhead Camshaft.
Is a design which only have one camshaft place within the cylinder head.
In a V engine, there are 2 camshafts-one per cylinder bank
In some SOHC engine, there will still have 4 valves per cylinder, but the design will more complicated compare with 4 valves per cylinder in DOHC.

DOHC
Refer to Double Overhead Camshaft.
Is a design where two camshafts being located within the cylinder head, where there are separate camshafts for inlet and exhaust valves.
Normally 4 valves per cylinder.
In a V engine, there are 2 camshafts per bank-total = 4
It allows manufacturer to easily implement a 4 valve per cylinder setup.

P/S: If the timing belt/chain snaps and the camshaft stops spinning, the piston coming back up the combustion chamber might hit the open valves. In order to prevent this, do change timing belt on time.

Recommend --- Change every 60,000 miles

How's VTEC Work

2007-11-18T12:26:00.000+08:00

Click HERE or HERE to have some idea..

Export Thunderbird Mail to Outlook 2003

2007-11-18T12:24:00.000+08:00

1. Download IMAPSize here, run it and choose as following.

2. Click on "Select mbox file to convert", and set the destination folder

3. After click on "Select mbox file to convert" button, dialog box will show as below, choose All file for file type and select the Inbox file to convert.

4. Open Outlook Express, and create a new folder (I create TB Inbox in this case) , then drag and drop all the file converted to respective folders as show below.

5. Choose File --> Export -->Messages in Outlook Express.

6. You can specify which folder to export from Outlook Express to Outlook 2003 or Export all folder, then just click on OK button.

7. For export address book to outlook 2003, please visit here.

8. YOU HAVE DONE !!!

1st Computing Book I Read

2007-10-03T09:24:00.000+08:00

"Coder To Developer - by Mike Gunderloy", this will be the 1st computing book I manage to digestED in my life, I learned from that book, although not all topic I can get in it well, but at least I know that, developer is not only who wrote code well, but a lot of thing need to know/learn..... from starting till the "end" of a application/project, tools and strategies for deliver software....xxx,xxx...so on.

Now I realised, I'm just a coder, not developer, after working 2 years in IT industry.... so sad....

~~Today onward, I will no call myself as developer untill a day I manage to deliver software with those tools, and strategies apply on ~~

Wow!!! what a cool slogan....

Insert ampersand '&' in MenuStrip

2007-08-07T11:44:00.000+08:00

Busy Googling web to looking for information "How to put an ampersand '&' in menustrip " this morning. ....

found that hard to find the related article, finally, I try to put double '&', WOW!! it works.

Normally we put '&' to indicate underline for the character after '&'

For eg : &Property will show Property

To have Save & Close like image show, simply put &Save && Close will do.

Compiler Assumptions for integral and floating point

2007-07-05T09:52:00.000+08:00

Java technology compiler makes certain assumptions when it evaluate expressions.
When you use primitive data type value in an expression with certain operator (*,+,-,/,%), the value are automatically converted to an int value (or higher if necessary), then the operation is performed.

Converted short to int

Convert float to double

Unhelpful Error Message

2007-05-24T10:54:00.000+08:00

org.hibernate.PropertyAccessException: exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) setter of com.company.core.common.pojo.Consultant.setAvailability

I found this error when I'm trying to run a method which is not related at all for Consultant class, but this error occur and make me surprise, I've check through the maping file, the settle method as error claim, restart netBeans, clean and build project...

but it still not working as what the expected result, FINALLY.... I found that, there is a null value in Consultant table (But the field is allow null), can some 1 tell me why....

Hibernate mapping error

2007-04-13T11:57:00.000+08:00

org.hibernate.type.IntegerType.set(IntegerType.java:39)

Let say you declare "long" as your variable data type in your class file, but you put type ="int" in hibernate mapping file, above exception will throw.
so, be careful when mapping your hibernate xml file.

Just Deploy

2007-04-04T11:34:00.000+08:00

I was confuse for long time, what should I do when I want to see the changes/output after modified the Java source file when web services is running? stop tomcat, run again? clean and build project? no, the answer is --just clisk on "Deploy Project", then netbeans will do the compiling, undeploy and redeploy job for you, that's simple. (NOTE: There must be a app server bundle in netbeans).

NetBeans – debugging error

2007-01-23T13:41:00.000+08:00

I found the below funny scenario when I was debugging my Java application using NetBeans 5.5, where the debugging line will go into comment, even empty line.

yoo-hoo! it get to debug as normal when I try to put a simple print line statement and set the breakpoint there, then start debug again ;-)

Compile Apache WebServer In Redhat Linux

2007-01-15T15:06:00.000+08:00

Download Unix Source from http://httpd.apache.org/download.cgi.
Extract the file by issue the following command : #gunzip http-xxx.tar.gz (Skip this if file extension is .tar) #tar -xf http-xxx.tar
Execute following command : # ./configure --prefix=/opt/apache --enable-mods-shared=most Note: (Set the prefix directory where you want to install Apache, Eg in this case is /opt/apache)
Issue the following command : # make
Issue the following command : # make install
Apache should successfully install in /opt/ folder now.
To start Apache, go /opt/apache/ then issue this command : # ./apachectl start
Verify examples at http://localhost, to make sure Apache start successfully :-)

Note: Please make sure Gnu C Compiler (gcc) is install before compile Apache.

Tomcat Multiple Context Path

2006-12-20T18:45:00.000+08:00

Problem to create multiple context path in server.xml as below: <Context path="/examples" docBase="examples" debug="0" reloadable="true" crossContext="true"> <Context path="/JAVA" docBase="C:\jakarta-tomcat-4.1.31\webapps\JAVA\web" debug="0" reloadable="true" crossContext="true"> bla…bla…bla bla…bla…bla </Context> </Context> FINALLY, I found that context path should write in this way :-) <Context path="/examples" docBase="examples" debug="0" reloadable="true" crossContext="true"> </Context> <Context path="/JAVA" docBase="C:\jakarta-tomcat-4.1.31\webapps\JAVA\web" debug="0" reloadable="true" crossContext="true"> </Context>

Tomcat Connector - Apache

2006-11-28T17:49:00.000+08:00

Here with the steps :

Get general version mod_jk here or Linux version mod_jk here then rename it as mod_jk.dll(Windows) or mod_jk.so(Linux) and put it into {Apache_Home}\modules. (eg: C:\ApacheGroup\Apache2\modules\mod_jk.dll) ** NOTE: (Download proper version to meet your need, in this case, I use Apache 1.3* & Tomcat 4.1*)
Get workers.properties here , and change the path for tomcat_home and java_home in the beggining of file. Then put it into {tomcat_home}\conf\jk\ (eg:C:\jakarta-tomcat-4.1.31\conf\jk\workers.properties)
Edit httpd.conf which located in Apache conf directory. Get example here and refer the setting part at line "Setting mod_jk Connector". (The simplest way is copy and paste the whole setting and paste into you httpd.conf, Don't forget to change the path to point to the correct directory in your machine)
Verify examples at http://localhost:8080/examples/, to make sure Tomcat is running.
Verify examples at http://localhost/examples/, on success, the connection is done successfully.

Click here for another quick start.

Click here for full workers.properties configuration doc

Java History

2006-11-15T08:58:00.000+08:00

1990

A small group of people were given opportunities to think of what “the next big big thing in technology”.

1991

A gang of four “brillian and bored” – James Gosling, Ed Frank, Patrick Naughthon, and Mike Sheridan, talk about leaving Sun for something more challenging after Sun president Scott McNealy said, “Maybe you guys are on to something… Why don’t you go hide somewhere and think about what it is”.
James Gosling, Ed Frank, Patrick Naughthon, and Mike Sheridan set themselves up in a secret off-campus office in Menlo Park above a Bank of America, and away from Sun and corporate “antibodies.” And named themselves as Green Project.
They began constructing a devices call star seven (*7), for the purpose of control of variety of everywhere devices.
James Gosling had written an “interpreter” in the form of a virtual machine made of software. He had also created a compact, simple software language, and necessary code compiler to drive the virtual machine. And he named for the new programming language--OAK.

1992

The green team had grown to 13, and dedicated to bringing their control demo to life.
The birth of Duke who explain everything you needed to know about the devices on screen.
Using just a standard remote control, you could view a list of program, change channel, and order and record shows over the network.
After 2 years of refinement and pitches, the team still couldn’t fine a market for their invention. No one ready to go for digital. Many cable companies feared they lost control of the viewer.

1994

A web browser created using Oak language.
What was unique about Oak browser was that it contains software (the “Oak runtime environment”) that allowed small application to run securely within a web browser. They named the browser-based application “applets”.
No longer Internet is flat.

1995

Lisa Poulson, who handle PR had arrange for the San Jose Mercury News to write a story on Java technology based.
The front page story positioned Java technology as “The Next Big Thing”.
Netscape Navigator 2.0 shipped with Sun’s Java technology.

1996

Sun created an official JavaSoft business unit and hired Alan Baratz (MIT doctoral and IBM researcher) as its president.
“Java Compatible” logo was created.

1997

By this year, Java programming was being taught in 78% of surveyed university and college.

1998

Sun launched the Java community Process (JCP TM) program which gives participants the right to create new pieces of Java technology through community collaboration.
By 1998, the team and industry partners were seeing vast horizons for Java technology. From very small application running on handheld devices to very large application running on network.

1999

At the JavaOne conference, Sun announced that the Java platform would now be available in three editions: 1. The Standard Edition (Core technology for desktop and server) 2. The Enterprise Edition (Medium to large business) 3 .The Micro Edition (small and mobile devices eg: cellphones)
Java technology powered mobile phone starting gather the stream around the world.

1999 – 2006 – ????

Axzlto (Part of the French conglomerate Schlumberger) give their implementation of “Java card” technology to sun.
Java powered the onboard computer in toys, car, planes and rockets, even gave NASA’s Mars Rover “eyes” by creating image out of data send from onboard camera.
Java technology use to connect a national patient database, hospital outpatient facilities and pharmacies for healthcare system project in South America.
A project based on Java card technology being use for personal identity card in Belgium.
eBays relies on Java technology to handle merchandise sales and registered user worldwide. * Information taken from -- “Hello world(s)!”, From Code to Culture: A 10 Year Celebration of Java TM Technology.

DirectCast vs CType

2006-11-09T10:56:00.000+08:00

Dim Q As Object = 2.37
Dim I As Integer = CType(Q, Integer) ' Succeeds.
Dim J As Integer = DirectCast(Q, Integer) ' Fails.

The difference between the two keywords is that CType succeeds as long as there is a valid conversion defined between the expression and the type, whereas DirectCast requires the run-time type of an object variable to be the same as the specified type. If the specified type and the run-time type of the expression are the same, however, the run-time performance of DirectCast is better than that of CType.
In the preceding example, the run-time type of Q is Double. CType succeeds because Double can be converted to Integer, but DirectCast fails because the run-time type of Q is not already Integer.

ListView Item/Subitem Location

2006-10-31T09:55:00.000+08:00

lv = ListViewItem
ListView.view = Detail (Set ListView.View Property to Detail)

(Example Listview with record)

Column1	Column1	Column1
lv.Items(0)	lv.Items(0).SubItems.Item(1)	lv.Items(0).SubItems.Item(2)
lv.Items(1)	lv.Items(1).SubItems.Item(1)	lv.Items(1).SubItems.Item(2)

(ListView location)

Access Levels

2006-09-26T09:31:00.000+08:00

The following table shows the access to members permitted by each modifier.

Constructor vs Method

2006-09-22T10:08:00.000+08:00

What is Static Variable

2006-09-18T08:57:00.000+08:00

Variables that are common to all objects.
Fields that have the static modifier in their declaration are called static fields or class variables. They are associated with the class, rather than with any object.
Every instance of the class shares a class variable, which is in one fixed location in memory.
Any object can change the value of a class variable.
class variables can also be manipulated without creating an instance of the class.
e.g: If you are going to create a variable serial number for an Item, which is unique for each, you can consider to declare a variable as static because no matter how many instance of class you create, they are also sharing the static variable.

Java Variable Naming Convention

2006-09-12T17:10:00.000+08:00

The first letter of a class name should be capitalized.
The first (or only) word in a method name should be a verb.
By convention, method names should be a verb in lowercase or a multi-word name that begins with a verb in lowercase, followed by adjectives, nouns, etc. In multi-word names, the first letter of each of the second and following words should bezed. Eg: getFinalData

Click HERE for more..

How to - Struts

2006-08-28T09:54:00.000+08:00

1. Create struts-config.xml (To store the configuration within project) 2. Create WelcomeInput.jsp (Create User input file) 3. Create ContactFormBean.java (Get and Set those variable pass from jsp page) 4 Create SignupAction.java (Java class which use to manipulate the data/variable) 5. Create confirmation.jsp (Display result of manipulated data)

For example: Click Here (netBeans Projects)

For brief concept, Click Here

How to - log4j

2006-08-25T17:21:00.000+08:00

1. Have log4j jar file to place into: 2. Have property file to place into :

3 .Example property file will :

log4j.rootLogger=WARN, Other log4j.appender.Other=org.apache.log4j.RollingFileAppender log4j.appender.Other.File=D:/Work/web/WEB-INF/logs/root.log log4j.appender.Other.MaxFileSize=1000KB log4j.appender.Other.MaxBackupIndex=3 log4j.appender.Other.layout=org.apache.log4j.PatternLayout log4j.appender.Other.layout.ConversionPattern=%d [%t] %-5p %c - %m%n log4j.logger.my.com.leadingside=DEBUG, appLog log4j.additivity.my.com.leadingside=false log4j.appender.appLog=org.apache.log4j.RollingFileAppender log4j.appender.appLog.File=D:/Work/web/WEB-INF/logs/app.log log4j.appender.appLog.MaxFileSize=1000KB log4j.appender.appLog.MaxBackupIndex=3 log4j.appender.appLog.layout=org.apache.log4j.PatternLayout log4j.appender.appLog.layout.ConversionPattern=%d %-5p %c - %m%n 4. Copy below code for testing

import org.apache.log4j.Level; import org.apache.log4j.Logger; public class TestLogger { static Logger myLogger = Logger.getLogger(TestLogger.class.getName( )); public static void main(String [] args) { myLogger.setLevel(Level.DEBUG); myLogger.warn("SUccess Debug From LOGER"); } }

5. NOTE / Attention !!

DEBUG, INFO, WARN, ERROR, FATAL following sequense, debug is the lowest level, means, it will log for INFO, WARN, ERROR, FATAL BUT if we set level to WARN, logger will log only ERROR, FATAL. eg: myLogger.setLevel(Level.ERROR); myLogger.warn("SUccess Debug From LOGER"); <--- This will not log */