Project JStock Development Blog

JStock 1.0.6j has been released, with robust cloud storage

2012-01-29T07:20:00.000-08:00

JStock 1.0.6j has been released, with robust cloud storage. We make full use of Google Doc, to store your very personal data. Please review our new privacy policy - http://jstock.sourceforge.net/privacy.html

Do not forget to write a positive product review for JStock, to provide encouragement to JStock development team :)

Feel free to grab a fresh baked copy of JStock from http://jstock.sourceforge.net/download.html

Migrating cloud storage from Google App Engine to Google Doc

2012-01-14T21:45:00.000-08:00

After researching for a while, we decide to launch the following development activity, in order to solve the problem http://yccheok.blogspot.com/2011/11/cloud-storage-is-temporary-unavailable.html

https://sourceforge.net/tracker/?group_id=202896&atid=983421

User may continue to enjoy cloud storage feature, with the additional enhancement.

No more cloud storage downtime, we do not host the server to store user data. We let Google Doc storage to store user data.
No more privacy issues, as data will be stored in user's Google Doc storage, not ours.

Development is still in progress. Stay tune. :)

Cloud Storage is temporary unavailable!

2011-11-08T06:51:00.000-08:00

UPDATE (15 January 2012) : We are now working out the solution to overcome this problem. For how our solution work, please refer to http://yccheok.blogspot.com/2012/01/migrating-cloud-storage-from-google-app.html

All the while, JStock's Cloud Storage feature is provided as FREE OF CHARGE. (Free as in free beer, and free as in freedom too).

However, due to the new pricing scheme introduced by Google recently, JStock's cloud storage will be temporary unavailable.

Under new pricing scheme, free quota offered by Google, will quickly consumed away by JStock users from all around the world, within few hours!!!

The below screen shoot explains what is going on.

As you can see, under old pricing scheme offered by Google, JStock's Cloud Storage service can run free of charge, within a single day, on Google server.

However, under new pricing scheme, this is how it looks like just after a few hours.

Currently, we are still figuring out, how we can make this cloud storage feature FREE always.

Switching to another service provider? But which service provider does provide free cloud storage, for an open source project?
Monetary support from JStock users? http://jstock.sourceforge.net/donation.html
???
???

Till now, we deeply apologize for the unavailability of cloud storage feature!

For temporary workaround, you may import and your data in Microsoft Excel format or CSV format as shown below. Just go to File -> Save as...

Besides import and export using Microsoft Excel/ CSV format, you may also perform backup, by perform copying operation on .jstock folder as described here : http://jstock.sourceforge.net/help_install_upgrade.html#upgrade-windows

JStock 1.0.6g has been released, with fix on Malaysia history data feed

2011-10-21T07:48:00.001-07:00

History data feed sponsored by http://www.klse.info/. With this, we had overcame Yahoo! history data feed problem for Malaysia market.

Thank you for KLSE.INFO sponsorship!

Buy American. I am.

2011-09-16T00:38:00.000-07:00

World stock markets are having down trend right now. However, there are no reason to be fear, if we learn from this wise man.

Buy American. I am.

JStock 1.0.6e had been released, by showing LOVE to German and Taiwan Chinese

2011-09-16T00:27:00.000-07:00

Thanks to our wonderful friend, Stefan Angrick from Germany. Now, JStock supports German language, and Traditional Chinese language.

Grab a fresh baked copy from http://jstock.sourceforge.net/download.html

Early Snapshot of jstock-android Development

2011-07-25T11:13:00.001-07:00

Here is the early snapshot of Android version JStock :-

Currently, I only plan to port over Portfolio Management feature from Desktop version JStock to Android version JStock.

This is because, I realize there a quite a number of free and good Stock Market related apps out there. For example, Bloomberg for Smartphone (https://market.android.com/details?id=com.bloomberg.android&hl=en)

However, I feel that their portfolio management feature is not as comprehensive as JStock's. That's where I try to make jstock-android fill in the gap. :)

Currently, jstock-android is under active development. You are welcomed to participate in it.

https://github.com/yccheok/jstock-android

JStock 1.0.6d - Fixes corrupted feed data

2011-07-22T08:22:00.000-07:00

JStock 1.0.6d has been released, to fix corrupted feed data.

Slow Development Progress of JStock - Why?

2011-06-30T09:01:00.005-07:00

Recently, you may notice that, JStock is having slow development progress. The latest release of JStock 1.0.6c only comes with 2 bug fixes.

This is because I am trying to port a subset of JStock's features into Android platform. Since I am pretty new to Android, this may take some time :)

JStock loves New Zealand :)

2011-05-23T10:28:00.000-07:00

JStock 1.0.6b is now supporting New Zealand stock market. :)

Feel free to grab a fresh baked copy (and free!) from http://jstock.sourceforge.net/download.html

Setup Git to Use WinMerge

2011-04-23T12:15:00.001-07:00

It is rather cumbersome to setup WinMerge for Git.

Here are the summarize steps.

Add the following line to C:\Users\yccheok\.profile

export TERM=msys
SSH_ENV="$HOME/.ssh/environment"

2. Add the following line to C:\Users\yccheok\.gitconfig

[diff]
tool = diffmerge

[difftool "diffmerge"]
cmd = "C:/Progra~1/WinMerge/WinMergeU.exe" "$LOCAL" "$REMOTE" | cat

To test out, type the following command.

git difftool HEAD A.java

It seems that using Git under Windows is still not a pleasant task yet.

Yahoo! Hasn't Fixed Data Inaccuracy Problem

2011-04-22T08:14:00.000-07:00

It is already 2 months since I contact Yahoo! Customer Support. However, data inaccuracy still occur in KLSE stock market.

I try to contact them again, by filling up Yahoo! Finance Data Inaccuracy Form. Hopefully they will fix it this time. :)

JStock 1.0.6 is ready

2011-03-29T07:55:00.000-07:00

JStock 1.0.6 is ready with the following changes.

Feature: Supports stock merging and splitting.

Feature: Supports stock buy and sell units in floating point.

Feature: Investment flow chart able to show individual stock activity.

Feature: Able to restore previous position and size of JStock.

Feature: Easy way to add new stock which is not in offline database.

Feature: Able to choose between 1 or 2 columns stock input suggestion list.

Feature: We allow user to view history, even though offline database is not ready.

Bugfix: Portfolio page will be updated even though it is not being viewed.

Bugfix: Avoid empty record in dividend chart.

Bugfix: Change Italy stock index from S&P/MIB to FTSE MIB.

Bugfix: Able to delete multiple figures from indicator editor.

Bugfix: Remove splash screen for better simplicity user experience.

Please grab the latest copy of JStock from http://jstock.sourceforge.net/download.html

KLSE Stock History Outdated for Yahoo! Finance

2011-03-29T06:29:00.000-07:00

The history stock data from KLSE is outdated for quite some time. Here is the reply from Yahoo! Customer Support.

Hello,

Thank you for writing to Yahoo! Finance.

Before I go into addressing your concern, I'd like to first apologize
for the delay in my responding to your inquiry. We are committed to
answering your questions as quickly and accurately as possible. However,
we are currently receiving unusually high volumes which caused the
delayed response.

I appreciate that you took the time to report this missing 1295.KL
historical data. I know it can be frustrating to encounter information
that is not up-to-date. We strive to keep our information as timely as
possible.

The information you are asking about is being pulled into Yahoo! Finance
from a third-party provider. We want to resolve the issue as quickly as
possible; however, the turn-around time can vary depending on both the
problem and the provider. In addition, there may be some lag time in
between when the provider corrects the information in their system and
the updated information displays on Yahoo! Finance.

Again, I apologize for any inconvenience.

Thank you again for contacting Yahoo! Finance.

Hopefully Yahoo! team is able to resolve this issue very soon.

Yahoo Finance History Data Out Dated

2011-02-23T08:14:00.000-08:00

PPB always stay to be one of my favorite stocks. However, this is not the reason I want to blog about. What I want to point out is, Yahoo! Finance history data is having inaccuracy problem recently.

See the below screen shoot.

The latest history date is Jan 17, 2011. It seems that the data is out-dated for more than a month. (Today date is Feb 27, 2011).

If this issue affects you, perhaps you want to contact Yahoo! through Yahoo! Finance Data Inaccuracy Form (Hopefully they are willing to give a hand to you)

Critical bug fix for JStock

2011-02-15T08:35:00.000-08:00

JStock 1.0.5y had been released, with a critical bug fix.

There is change in stock server policy. Stock server may return empty stock symbol for certain stocks, especially for United State stock market. We will ignore those empty stock symbols, and replace them with our own offline stock database's.

JStock 1.0.5x had been released (I Am Sorry! 1.0.6 Is Not Ready Yet!)

2011-02-10T08:50:00.000-08:00

JStock 1.0.5x had been released, which has 6 features and 5 bugs fixed.

Feature: Stock Watchlist will able to load result saved from Stock Indicator Scanner.

Feature: Able to use left/right arrow key to move around yellow information boxes of Investment Flow Chart.

Feature: Make the stock purchase process smoother, by doesn't require user to press ENTER explicitly.

Feature: Automatic switch to the particular page, when user tries to activate a portfolio or watchlist.

Feature: Having a confirmation dialog box, to avoid user from clicking uninstall icon accidentally.

Feature: Indicator scanning completion progress will be displayed at status bar.

Bugfix: Able to suspend and resume network activity in PortfolioManagementJPanel when not in used, so that network resource is being preserved.

Bugfix: Adjust combo box popup width, so that horizontal scrollbar will not displayed.

Bugfix: Instead of limiting currency decimal places to 2 only, we allow them to float between 2 to 3, to avoid from losing precision.

Bugfix: Prevent user from uploading Stock Watchlist file with too many stocks to cloud server.

Bugfix: Under dividend dialog box, the stock selection through combo box will be sorted in alphabetical order.

You may download latest JStock 1.0.5x from http://jstock.sourceforge.net/download.html. After upgrade, your personal data will be preserved.

Please write us Ratings and Reviews after you have used JStock, to help us in making JStock a better software.

(We apologize for the delay of version 1.0.6, as there are quite a number of technical hurdles which prevent us from moving too fast.)

JStock 1.0.6 Planned Features Survey

2011-01-13T08:35:00.000-08:00

Next version JStock 1.0.6 is under heavy development. YOU will determine how upcoming JStock 1.0.6 looks like. Tell us what do you think, by answering only 2 survey questions. Thank you.

Take the survey right now!

We had migrated from CVS to Mercurial

2010-12-13T09:42:00.000-08:00

Hello all,

Previously, we are using CVS, as a software development tools to manage our source code.

Today, we are happy to let you know that, we had success to migrate all our code base, from CVS to Mercurial. There are 2 major reasons why we want to do so.

We want to be able to commit and compare during development work, even we do not have internet connection.
We want to make branching and merging easier. By making them easier, we can have a stable trunk, and several experimental features being implemented parallel. Experimental features shall be implemented in branch before merging into default trunk.

For historical reason, the CVS repositories will always be there. Just that, it will not receive any future commit. All the future commit work, will be going into Mercurial.

http://jstock.hg.sourceforge.net/hgweb/jstock/jstock/rev/aca91878090e

With all these great software development tools in place, we hope to produce a higher quality software to make you happy :)

JStock migrates from CVS to Mercurial

2010-12-02T09:42:00.000-08:00

In order to improve our development process, JStock has been migrated from legacy CVS to a modern Mercurial.

We expect this may take some time, and all development work will be halted temporary.

http://jstock.hg.sourceforge.net/hgweb/jstock/

JStock 1.0.5s is ready

2010-11-03T09:53:00.000-07:00

Another exciting release of JStock, comes with improved portfolio display, online stock database, improved charting and many bug fixes.

Get a copy from http://jstock.sourceforge.net/download.html

What are we busy on recently?

2010-10-21T11:44:00.000-07:00

We are now working on the next release of JStock.

One of the key features will be, able to add new IPO stocks easily through Stock Database.

As you type, JStock will connect to the online Stock Database, and prompt you for the matched stocks. This will be extremely useful, while you unable to find a stock in your offline Stock Database.

Why don't we have this feature in Stock Watchlist?

This is because reading from online Stock Database, will be much slower than reading from offline Stock Database. This especially true, for those users behind low Internet bandwidth connection.

A user friendly and responsive application, is always our high priority. :)

中文版网站 (Chinese version web site)

2010-09-18T15:38:00.000-07:00

我们推出了中文版网站给中国 JStock 用户了 : http://jstock.sourceforge.net/zh/

(We had released Chinese version web site for China JStock users : http://jstock.sourceforge.net/zh/)

1.0.5n had been released quietly

2010-08-26T12:32:00.000-07:00

1.0.5n had been released, with China stock market being supported. However, we tend not to make any publicity among China users, as our Chinese version web site is still in progress.

China Stock Market Support Development Progress

2010-08-14T22:01:00.000-07:00

It had been a quite July. Yes. We are busy working on to support China Stock Market. They are in very good progress. Here is our initial work in supporting various input method for China users. 汉语拼音 (PinYin), 中文 (Chinese) and Stock code.

JStock 能说中文了

2010-07-02T10:21:00.000-07:00

新 JStock 1.0.5m 能说中文了。

欢迎下载 http://jstock.sourceforge.net

There are no new release for this June???

2010-06-24T09:50:00.001-07:00

I hope not. As I am still *BUSY* commiting all the code changes.

Stay tune. I hope we can make a release, at least before end of this June.

Look Mum! We Have Another New JStock Release!

2010-05-13T12:09:00.000-07:00

New JStock - Free Stock Market Software 1.0.5L Released

Feature : User may have multiple watchlists. Categorize among high growth stocks and dividend gained stocks made easy.

Many bugs fixed as well.

If you are interested, you may download from http://jstock.sourceforge.net

It has been a quiet month for JStock

2010-04-25T10:37:00.000-07:00

Yes. It has been a quiet month for JStock. There are NO new release for this April!

Instead, we are currently planning out a new feature for JStock. We want to enable users to draw various figures (Circle, rectangle, line...) on the top of current charting.

We also want to have a feature, so that with a single button click, user may publish their drawn charts to the public.

Our initial plan is to make use of existing JHotDraw, to speed up the development work. However, after some discussion with JHotDraw's team, we realize the technical barrier is rather high.

See our discussion with JHotDraw's team :

https://sourceforge.net/projects/jhotdraw/forums/forum/39887/topic/3657046
https://sourceforge.net/projects/jhotdraw/forums/forum/39887/topic/3687321

We gone through all the available Java 2D Drawing Framework list. http://www.manageability.org/blog/stuff/open-source-structured-graphics-libraries-in-java

However, none of them fit into our requirement.

Sadly to say, we may need to code this feature from scratch, instead of re-using code from others.

This also means you have to wait for longer period, to enjoy the above released feature.

Meanwhile, if you have small enhancement request at this mean time, you may send us the request through forum : https://sourceforge.net/projects/jstock/forums/forum/723854

We will see whether we are able to slot it into our schedule ;)

Survey Result on JStock

2010-03-18T08:11:00.000-07:00

Around February 2010 time, we conducted a simple survey across JStock users.

97% Users Feel that JStock is an Easy to Use Software

This pretty inline with we our very initial objective of JStock.

Make Your Stock Investment Fun and Easy

Here is the summary of our survey, take a look.

http://spreadsheets.google.com/viewanalytics?hl=en_GB&formkey=dEd1VTVwSEFTMHhsM0F2MEttWmZUbmc6MA

Of course, we want to thank you to all the users who participate in this survey. You had helped us to understand you better. Thank You!

Feel Free to Try Out Our New Help System

2010-03-16T10:43:00.001-07:00

A good help system, will be an add-on bonus for a piece of software. Feel free to try out our very new Online Help System : http://jstock.sourceforge.net/help.html

Critical Bug Fixed

2010-03-15T06:38:00.000-07:00

Bugfix: Critical bug fixed, when color changed options is being enabled, the entire Real-Time Info tab will freeze. (#2968754) (#2970454)

We apologize for any inconvenient caused by this bug.

The bug fixed version can be downloaded from http://jstock.sourceforge.net

JStock Helps You to Buy Low Sell High

2010-03-07T05:41:00.000-08:00

JStock 1.0.5i is ready to be downloaded. This times, we make a few improvement.

In order for me to Buy Low Sell High, inspecting the lowest price and the highest price within N periods is what I do usually. When the stock price nears 1 year highest, perhaps it is the best time to sell. Or, when the stock price nears 1 year lowest, perhaps it is the best time to sell. Current improved charting feature enables me to do so in an easy way.

Sometimes, user has his very own preference email other than GMail.

Hence, we let user to choose ANY email address to receive stock alert message. User still required to provide his own GMail account information, as GMail SMTP (a server used for sending emails) is the only stable server we know so far.

Feel free to grab a copy of this software from http://jstock.sourceforge.net

Genting starts to move in downward trend

2010-02-21T01:48:00.000-08:00

Genting starts to move in downward trend, with its short term moving average starts to break through long term moving average.

My average purchasing price is 6.85, which I consider as a bad entry point.

Chance for me to lower down my purchasing price is coming soon. Yeah!

Can you help us to make JStock a better software?

2010-02-20T09:16:00.000-08:00

Participate in The Survey

The JStock team wants to THANK YOU for the integral role you play in making the software thrive.

With the idea of continuous improvement in mind, we want to know more about you, our user.

Your survey responses will help us further understand the features of the software you like most.

We know you’re busy, so this survey will only take a minute. Or two. Maybe three… AT MOST.

Pre-Chinese New Year Release - 1.0.5h

2010-02-09T12:08:00.000-08:00

JStock 1.0.5h had been released, with massive improvement on charting side.

Kindly try it out.

Wish everyone have a handsome gain before Chinese New Year. I hope that JStock will provide little help :)

Investment Flow Chart

2010-02-06T21:11:00.000-08:00

Here is the comment we received from one of our beloved end users.

My big problem now is to find the transaction history of a stock. If I enter BHP purchase details, then that shows just fine on the screen. When I then sell the stock, the details of the BUY disappear. How do I recall them?

We decide to come out : Investment Flow Chart

Do you like it?

* Note : This is an unreleased feature yet.

We Want a Better Charting

2010-02-03T10:33:00.000-08:00

Yes. We all know that, JStock's charting is pretty primitive. (At least for current moment)

We value you as our free software user. Hence, we work quite hard, to improve the user experience of charting.

In next release of JStock, we are going to have a new charting feature.

Real-Time Mouse Tracing

This means, as you move your mouse along the chart, a small blue ball will be sliding along the chart line. A small semi-transparent windows will be sliding along, to show you the detailed information.

The above is the screen shoot of early snapshot. We are now working hard, to polish it up.

During this period, we would like to hear your comment on this feature.

Do you like the yellow color window?
Do you like the blue small ball?
Do you like the font size?
...

Leave your comment, or drop us an email at yccheok at yahoo dot com

Thank you very much! We hope you will continue enjoy using JStock.

German Likes JStock Too

2010-01-13T10:54:00.000-08:00

German likes JStock too

http://www.computerbild.de/artikel/cb-News-Software-Tipp-JStock-4974794.html

Can JStock Speak Chinese?

2009-12-21T08:22:00.000-08:00

This is our wish!

We want JStock able to speak all languages other than English. Due to the technical difficulties, we will have to postpond this plan till 2010.

New Year Release?

2009-12-21T08:12:00.000-08:00

Is a shame that after release 1.0.5f, we still have unfinished feature yet.

Let's go back to what we plan on 1.0.5d. Can we finish all the below features before we step over to new year 2010?

Let's wait and see.

Better User Defined Stock Symbol Feature (Done)

Better Transaction Fee Calculation

Support of Brazil Stock Market (Done)

Having Alert Sound Feature (Done)

Having Fast Stochastics Indicator

Able to Purchase Stock through Indicator Scan Result (Done)

Bug Fixing on Internet Connections Problem under Some Linux

1.0.5d Is Here

2009-12-06T08:37:00.000-08:00

JStock 1.0.5d had been released by today. (Sorry, it may not tally with initial release plan, due to tight schedule)

There are several highlights :

Feature: Is my dividend earning increased from year to year? Is Microsoft dividend payout decreased from year to year? JStock will help you the answer all the dividend questions.

Visit here for more info.

Feature: Enable user to specific symbol in user defined database. Instead of typing code "6012.KL" which is difficult to be memorized. You may choose to enter symbol "MAXIS".

Visit here for more info.

Feature: Pressing ESC, will enable user to deselect table in Real-Time Info, Stock Indicator Scanner and Portfolio Management.

Feature: Added "JStock Home" menu.

Feature: Right-click and buy stocks from the Stock Indicator Scanner.

Bugfix: Incorrect Hong Kong Database. Click on the small bottom right computer icon, will resolve the issue.

Bugfix: Wrong information for Spain Market database. Click on the small bottom right computer icon, will resolve the issue.

Like it? Just download from here

Upcoming 1.0.5d Release Plan

2009-11-22T07:21:00.000-08:00

Here is our plan for the upcoming 1.0.5d :-

Better User Defined Stock Symbol Feature

Current, for newly listed Maxis stock, I have to key in "6012.KL". How I wish I could just key in "Maxis"

Better Transaction Fee Calculation

OK. I just received complains. Not every country is having Stamp Duty, Broker Fee, Clearing Fee.

Support of Brazil Stock Market

Having Alert Sound Feature

Having Fast Stochastics Indicator

Able to Purchase Stock through Indicator Scan Result

Bug Fixing on Internet Connections Problem under Some Linux

If you feel that there are some features missing out from the list. Let us know. We will try to fit in, if there is enough room space ;)

Let JStock Floating On The Cloud

2009-11-03T13:40:00.001-08:00

Yes. With new 1.0.5b, you may access JStock settings from anytime and anywhere. Truely cloud computing ;) (Opps, another buzz term)

You may download new JStock, from http://jstock.sourceforge.net/download.html

Note that, bugs on UK portfolio issues and Technical Analysis also solved.

1.0.5 Is Coming To Town

2009-10-22T03:22:00.000-07:00

JStock 1.0.5 had been released by today. Come with comphrehensive Technical Analysis feature.

Don't forget to check out my newly written Technical Analysis tutorial

Stock investment is always being fun and simple. Life is good ;)

Early Snapshot of 1.0.5

2009-10-20T18:01:00.000-07:00

Version 1.0.5 is planning to be released before end of October, starting to have support on Technical Analysis. For beginner on Technical Analysis, need not to worry. JStock is designed in the way, to provide you a gentle and smooth introduction, toward the usage of Technical Analysis in your investment strategy.

Here is some early screen shoot. Currently, we only plan to release 3 common used Technical Analysis Indicators - Moving Average, RSI and CCI.

Easy to use Indicator Installation System. Install useful indicators with just a single button click. These indicators may suggest you on the best buying time and best selling time.

Easy to use Technical Analysis Charting. Let you have a throughout study, on your favorite stock.

Upcoming JStock Release

2009-10-08T03:29:00.001-07:00

The upcoming JStock release will emphasize on Technical Analysis.

We are planning to release the following features in the next coming release :

Ability to build complex indicators such as CCI
Able to install ready-to-use indicators from JStock server
Technical Analysis on Charting
Ability to able to save entire JStock configuration into cloud, so that you will able to use JStock either from Home or Work

Here is the early snapshot of upcoming release.

For technical analysis lover, stay tune ;)

Interviewed by SourceForge

2009-10-03T23:05:00.001-07:00

Interviewed by SourceForge : https://sourceforge.net/community/jstock-software-aids-international-investing/

Another JStock Software Review

2009-09-25T11:02:00.000-07:00

Another software review on JStock :

http://www.ilovefreesoftware.com/16/windows/productivity/finance/jstock-manage-portfolio-get-free-sms-alerts-for-stocks.html

New 1.0.4j Release - Many New Features and Bug Fixes

2009-09-25T04:22:00.000-07:00

New JStock 1.0.4j had been released, with the following highlight :

Multiple Portfolios - You may share the fun of JStock with your love and family, by creating individual portfolios for every family members.
Fully Support Excel/CSV Format - You able to save/open portfolio, indicator scan result and stock history.
Options to Limit Number of SMS - You able to select how many SMS you want to receive per day.
Fast and Reliable New Malaysia Stock Server

And many bug fixes...

Feel free to download from http://jstock.sourceforge.net

JStock Software Review

2009-09-04T03:30:00.000-07:00

JStock receives a very positive software review (5/5 rating) from freewaregenius.

Take a look on this review article

New website for JStock is launched

2009-08-30T20:35:00.000-07:00

A completely new design for JStock website is launched.

http://jstock.sourceforge.net

Feel free to take a visit ;)

New 1.0.4i Release - Fix On Network Speed

2009-08-17T10:16:00.000-07:00

In previous version of JStock, there is a possibility that you turn on JStock for 2~3 days, it may eventually slow down your whole computer network.

Here come the fix :

Able to update stock information in blazing fast speed, without slowing down your computer network.

We highly recommence you to upgrade to this version, to reduce the burden of your computer network.

Donation. Anyone?

2009-08-06T19:57:00.000-07:00

Currently, JStock is having the latest release 1.0.4h-bugfix.

We do plan to release another feature "Able to save JStock files into cloud (#2833216)".

Isn't great, when you go to office, you may use JStock to open up the portfolio, which is being added at home yesterday night?

We need donation for this feature.

Please visit http://jstock.sourceforge.net/faq.html#donation for how your donation is going to be used.

New 1.0.4g Release - Fix On Malaysia Stock Market

2009-08-04T13:01:00.000-07:00

An emergency release for Malaysia Stock Market lover :p

JStock 1.0.4g - 2009-08-04
Displaying history for index (#2831881)
Bugfix: Not able to connect to KLSE data (#2831804)
Bugfix: Fall Below and Rise Above false alarm (#2826327)

Welcomed Nanne Baars(nb76) As Our New Developer

2009-07-30T09:01:00.000-07:00

Quality contribution from community, is a key factor to ensure healthy growth of an open source project.

I am very happy to announce that, Nanne Baars(nb76) will become the developer of JStock. Nanne Baars has provided a high quality patch for feature "Auto detect proxy server - ID: 1771740".

nb76, welcomed on board ;)

Opening Positions For JStock

2009-07-23T09:42:00.000-07:00

JStock is looking for good people like you! We are having two positions, in order to accelerate the growth momentum of JStock project.

Here are the two positions :

Marketing Executive

Java Programmer

If you are interested, feel free to apply. We are looking forward your contribution!

Thank you!

New 1.0.4f Release - Free SMS Alert

2009-07-21T22:48:00.000-07:00

Yes. JStock now come with Free SMS Alert feature. Yes! It's free!

Check it out from http://jstock.sourceforge.net

New 1.0.4e Release - Bug fixed on Portfolio

2009-07-18T07:50:00.000-07:00

I would like to apologize for any inconvenient. In version 1.0.4d, we are having a bug in portfolio, which causes incorrect result in dividend and cash deposit.

We had fixed this bug in the latest version 1.0.4e.

Please get the latest version from http://jstock.sourceforge.net/download.html

Thank you for your support.

Mind Map In Software Development

2009-07-09T10:14:00.000-07:00

After a few days of brainstorming + paper + pencil, I still fail to generate a concrete idea on the overall implementation of upcoming JStock's feature.

I realize that there is a technique, to organize and stimulus your idea. It is called Mind Map.

It seems weird at first look, to organize your idea in such a way. However, I do give it a try by using FreeMind.

Just after one and a half hour, I am able to draft out a big picture of the feature.

It seems that as you trying to break down your ideas into smaller chunks and document them down, more new ideas will be stimulus.

Great! Isn't it?

Setup OpenGL + Visual C++ Express Edition 2008

2009-07-09T04:30:00.000-07:00

Good reference on how to setup OpenGL + Visual C++ Express Edition 2008

http://sites.google.com/site/yanchengcheok/Home/howto.pdf

Configure TortoiseCVS to Access Sourceforge through SSH In Windows Vista

2009-07-05T10:11:00.000-07:00

All the while, I have been using SmartCVS to access sourceforge CVS repository. SmartCVS is really a nice piece of CVS GUI client software. It serves all my need for my day to day CVS operation. However, I am using free edition (please forgive a poor free software developer), and free edition comes with the following limitation :

No conflict solver feature.
No branch merging.

Since I start to apply branching in my sourceforge project, free edition SmartCVS no longer serve me well. Another free alternative, TortoiseCVS came to my mind. I had tried to use this software few years ago in my Windows XP, and I am happy with it too.

Now, I am using Windows Vista. I thought TortoiseCVS shall able to work well in Vista too. However, I get the following problem while using TortoiseCVS :

TortoisePlink.exe keeps on crashing

After several hours of configuring, I was finally success to perform the following task :

Use TortoiseCVS to Access Sourceforge through SSH in Windows Vista

I would like to share my experience, in case anyone of you need to perform similar stuff as me.

Download pageant.exe, plink.exe, putty.exe and puttygen.exe from here. When the time I download, it was version 0.60. I locate all the 4 exe files in c:\putty
Launch putty.exe. You will see the following screen. Click on "Generate"
Keep moving your mouse randomly as instructed by putty.exe. After a while, you shall see the following screen.
Click "Save private key". I save it in c:\putty, as file name "C:\putty\SourceForge-Shell.ppk".
Then select all, and copy text under "Public key for pasting into OpenSSH authorized_keys file". The public key information will be later used to submit to sourceforge server.
Go to "Control Panel" -> "Adminstrative Tools" -> "Task Scheduler", add the following new task. This is to make your Vista auto load private key through pageant.exe, each time you log on to Vista. We want the following command to be executed. "C:\putty\pageant.exe C:\putty\SourceForge-Shell.ppk"
After you restart your computer, you shall able to see the following spy agent liked icon in your system tray. (OK, I know you are trying to figure out what Anti-Virus I am using, who cares?)
Now, we want to send the public key information in step (7) to sourceforge. Go to your personal page in sourceforge.
Go to "Account Options", then scroll down until you see "Host Access Information". Paste the public key information and save. Note that, the entire public key information shall be in 1 line.
Right click on your desktop, go to CVS-> Preferences. Change your SSH application to c:\putty\plink.exe and SSH parameters to -l "%u" "%h"
Now you may check out your sourceforge project, and start to hack on it :)

New 1.0.4d Release - Cash and Dividend Management

2009-06-07T22:56:00.000-07:00

Another excited 1.0.4d release from JStock.

We did some major work on Portfolio management, by integrating it together with cash and dividend management. Picture worths thousand words. Let's see our new freshly portfolio.

You may add comment to your every transaction.

You may manage your cash.

You may manage your dividend payout.

This didn't give you enough reason to download yet? No worry. We had embedded another new character into our JStock, his name is blobsallad.

Want to know what it can do? Just download fresh and new JStock. :)

New 1.0.4c Release - Good News For Intraday Traders

2009-05-14T11:01:00.000-07:00

Good news for Intraday traders.

Although we are now busy pushing for release 1.0.5, we must not forget the need of our beloved end users at the same time. We try to keep frequent update and release on new features and bug fixes.

This round, 1.0.4c release, we choose to bring good news to intraday traders. JStock comes with Intraday Stock Price Snapshot. If you are a daily trader, we understand that your need in monitoring stock price movement in seconds precision. Hence, JStock is providing Intraday Stock Price Snapshot. The stock price will be captured in every 10 seconds in daily basics, lasted for 2 hours.

Here is the screen shoot of this cool feature :

Good News For Mac Users

2009-05-14T10:25:00.000-07:00

Good news for Mac users. We had recently recruited a loyal Mac user to our team, to build a package for JStock in order. We want Mac users able to execute JStock smoothly.

The released date for Mac dmg file shall be expected to fall within this week. Stay tune ;)

Feature [2676553] On The Way

2009-05-05T19:59:00.000-07:00

Today, we plan to start work on feature [2676553]. This will be the key feature for our very exciting next major release - 1.0.5

First, I decide to review our "two-dimensional graphics framework" library. Currently, we are using JHotDraw. After several consideration, "stability", "requirement", "compatibility", we decide to stay on JHotDraw.

I foresee that we will be required to work on JHotDraw source code, either understand it or expanding from it. Hence, grabbing out the right JHotDraw source code is another big task.

Our previous JHotDraw version is 7. However, I have a hard time to figure out the minor version of current deployed JHotDraw. After some try and error, I decide to give up figuring out current JHotDraw minor version.

I decide to first port over JStock source code, to make use of latest JHotDraw 7.1. The latest stable version of JHotDraw 7.1 is released since 2008-03-25.

After building JHotDraw 7.1 together with quaqua.jar, java_30.zip and MRJAdapter, we obtain a hot baked JHotDraw 7.1. When run it together with JStock 1.0.4b, opps...

[yancheng@yancheng jstock]$ java -jar jstock.jar
Exception in thread "AWT-EventQueue-0" java.lang.NoSuchMethodError: org.yccheok.jstock.gui.OperatorFigure.add(Lorg/jhotdraw/draw/Figure;)V
at org.yccheok.jstock.gui.OperatorFigure.(OperatorFigure.java:70)
at org.yccheok.jstock.gui.LogicalOperatorFigure.(LogicalOperatorFigure.java:35)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
...

Look like we have some work to be done :)

JStock - Stock Market Software: 1.0.4b Released

2009-04-28T10:06:00.000-07:00

New version of JStock 1.0.4b has been released with the following features and bug fixes.

1. [2686577] Feature added. Proxy Auth Support. Contributed by gransi.

2. [2722273] Feature added. Read/ Write on Excel/ CSV File Format.

3. [2725384] Remember The Width of Table Column. Contributed by gransi.

4. [2687975] Bug fixed. Wrong Information Displayed For Korea Market.

5. [2767249] Bug fixed. Current price Is 0 when there is no transaction on that day.

6. [2737316] Bug fixed. NPE in ArithmeticOperator.division. Contributed by wolfc.

You may download JStock 1.0.4b from http://jstock.sourceforge.net

Unhappy OSX User

2009-03-30T11:09:00.000-07:00

It seems that we are having some unhappy OSX users.

https://sourceforge.net/forum/forum.php?thread_id=3103567&forum_id=723855

As hard core Windows user, I do not own any OSX to reproduce the problem. Hence, I decide to setup a virtual environment for OSX, by using VMWare player. Just like what I had done to test JStock for Ubuntu Linux, under VMWare player.

Unfortunately, OSX under VMWare player is much more resource intensive than what I am expecting. Moving a mouse pointer, click on the Safari icon, take 1++ minute to launch the browser!!!

After several tries, I decide to give up the idea of perform testing under VMWare. OK, I would like to invite OSX packager to join JStock project, as posted here and here.

Anyone?

Further Addon Plans for 1.0.4b

2009-03-30T10:51:00.000-07:00

During the development of 1.0.4b, we discover other bugs which may make our end users unhappy.

[2687975] Wrong Information Displayed For Korea Market

Hence, we decide to mark this as "Must Fixed", before we are losing potential Korean user.

Interesting Blog by Joshua Bloch

2009-03-19T14:40:00.000-07:00

I have been reading an interesting blog by Joshua Bloch, Extra, Extra - Read All About It: Nearly All Binary Searches and Mergesorts are Broken

The following solution can be found in latest version of JDK


int mid = (low + high) >>> 1;

The first thing which comes across my mind is that, (low + high) will cause sign overflow too. However, the comment from the following reader clears out my mind.

">>>" is the unsigned right shift operator. So if I'm not mistaken (low + high) is stored in unsigned int and then shifted one to the right dropping remainder leaving a division by 2 with no remainder returned as a signed int. So it does work.

Very cool, isn't it?

Patches and Minor Fixes Planned for 1.0.4b

2009-03-12T14:57:00.000-07:00

The release of 1.0.4a had been locked down. This means there shall no be any further major enhancement and major bug fixing for 1.0.4a. All the major enhancement and bug fixing will be going into release 1.0.5.

However, patches and minor bug fixing will still be released along the line 1.0.4b, 1.0.4c…

After the few hours released of 1.0.4a, 3 minor bugs (which doesn’t not have large impact to the end users) had been identified :

(1) False alert being received in “Fall Below” - The plan to fix this is to include more detailed in the email sent out by JStock, in order for developers to track down the problem

(2) NPE while changing country - This shall not have the major impact, as NPE is caught at Swing Event Dispatch level. However, there shall not be any NPE thrown.

(3) Two country channel displayed at the same list box while changing the country. There should be only one.

Developers are now working on to resolve the problem. All the above mentioned problem are targeted to be released at 1.0.4b

11 New Countries Support In 1.0.4a

2009-03-12T14:56:00.000-07:00

Due to request from users, the following new countries had been added in version 1.0.4a

- Australia
- Austria
- Belgium
- Canada
- HongKong
- Indonesia
- Korea
- Netherlands
- Portugal
- Switzerland
- Taiwan

Thanks to the well design abstraction employed by JStock. All the new countries can be easily added within a night, with not much difficulty encounter ;)

Welcomed to JStock Development Blog

2009-03-12T14:55:00.000-07:00

The development goal for JStock 1.0.5 had been defined :

Further enhance usability of Stock Indicator Editor.

Two feature tracker had identified with highest priority :

[2676553] Complex Operator composed of Primitive Operator
[2214275] Internationalization and Localization

Stay tune on the development progress of JStock.

Java Generic Array Creation

2008-10-31T21:56:00.000-07:00

Consider the following code :-


class A<E>
{   
    public A<E>[] array = new A<E>[4];
}

We will get the following compilation error :-

C:\Projects\Main\src\test\Main.java:24: generic array creation

This is due to erasure in generic http://en.wikipedia.org/wiki/Generics_in_Java, which posts a limit to generic array creation.

The workaround is simple. Here is the fixed code :-


class A<E>
{   
    @SuppressWarnings("unchecked")
    public A<E>[] array = new A[4];
}

However, is it safe to do so? Yes. Generics are checked at compile-time for type correctness. We still able to receive "protection" from the above code. Consider the following :-


public class Main {        
    public static void main(String[] args) {
        A<String> a = new A<String>();
        // We try to do some stupid thing here.
        a.array[0] = 0;
    }
}

The compiler will prevent us to do "stupid" thing by flagging us :-

C:\Projects\Main\src\test\Main.java:32: incompatible types

We are being protected :)

Compile Open Source Edition QT4.4.3 using Microsoft Visual C++ 2008 Express Edition

2008-10-18T11:30:00.001-07:00

It is pretty simple and straight forward to compile open source edition QT4.4.3 using Microsoft Visual C++ 2008 Express Edition

1) Add the following path "C:\Program Files\Microsoft Visual Studio 9.0\VC\bin" into environment variable.

2) cd C:\QT\4.4.3 (Assume you extract out qt-win-opensource-src-4.4.3.zip there)

3) vcvars32.bat

4) configure -platform win32-msvc2008

5) nmake

Done :)

String As Template Parameter

2008-10-15T07:48:00.000-07:00

Consider the following template function :-


template<const char* T>
void fun()
{
}

How can we make a call to this function?

"Easy!". I heard you are saying that way. Just :-


const char* s0 = "hello world";

int main()
{

    fun<s0>();
    return 0;
}

However, when performing compilation, our Visual C++ gives us the following compilation error :-

error C2975: 'T' : invalid template argument for 'fun', expected compile-time constant expression

"Arghh, I know that, just provide array of character, as its length is known during compile-time."

(Note : To understand the difference among char pointer and char array, please refer to http://support.microsoft.com/kb/44463. We may use sizeof operator, which is evaluated during compile-time, to retrieve string length information from char array, but not char pointer)

So, we would have something like this :-


const char s0[] = "hello world";

int main()
{

    fun<s0>();
    return 0;
}

OK. It should compiled then, isn't it? However, our compiler again make a complain :-

error C2970: 'fun' : template parameter 'T' : 's0' : an expression involving objects with internal linkage cannot be used as a non-type argument

I heard you are crying.

Take a rest for a while. Let's forget string template parameter at this moment. Let us take a look into internal linkage and external linkage. Consider the following two files :-


// Module0.cpp
////////////////////
//Internal Linkage//
////////////////////

// Constant pointer which is having internal linkage
char* const s0 = "hello";

// Constant string with constant pointer is haing internal linkage
const char* const s1 = "hello";

// Internal linkage
const char s3[] = "hello";

and


// Module1.cpp
////////////////////
//Internal Linkage//
////////////////////

// Constant pointer which is having internal linkage
char* const s0 = "hello";

// Constant string with constant pointer is haing internal linkage
const char* const s1 = "hello";

// Internal linkage
const char s3[] = "hello";

There are two modules. Two modules are having the same set of variable names. However, when we compile and link them together, everything just work fine. This is because they are having internal linkage. The variables are only visible within their own translator unit (object file). No conflict will occur.

How about external linkage? Consider the following two files again.


// Module0.cpp
////////////////////
//External Linkage//
////////////////////

// Constant string which is having external linkage (Early detected during compiled time)
const char* s0 = "hello";

// String with external linkage
char* s1 = "hello";

and


// Module1.cpp
////////////////////
//External Linkage//
////////////////////

// Constant string which is having external linkage
const char* s0 = "hello";

// String with external linkage
char* s1 = "hello";

We will fail during linking time. The external linkage variables are visible among other translator units. Hence, compiler will complain duplicated variable's names being detected.

Till now, I guess you roughly have an idea on why the char array is not being accepted by template function. char array is having internal linkage by default. We need to explicit state that we want external linkage.

Please do not ask me why it must be external linkage. Ask Bjarne Stroustrup. His 14.3.2 "The C++ Programming Language" states that way.

The final piece of code to solve this problem is :-


extern const char s0[] = "hello world";

int main()
{

    fun<s0>();
    return 0;
}

Template Version memcpy

2008-10-12T19:58:00.001-07:00

I came across the following code snippet few days ago


template<int size, typename T>
void template_memcpy(T* dest, const T* src)
{
    struct type {
        T data[size];
    };

    *reinterpret_cast<type *>(dest) = *reinterpret_cast<const type *>(src);
}

The code seems pretty cool. It performs conventional memcpy, by depending on compiler generated code.

I made a test on Visual C++ 2008 compiler, to see whether the generated code from template_memcpy, is as good as conventional c-style memcpy.

Our source is a 31 bytes char array. Take a look on the conventional c-style memcpy source code, together with its disassembly.


        memcpy(dest, src, sizeof(src));
00241053 B9 07 00 00 00   mov         ecx,7
00241058 8D 74 24 1C      lea         esi,[esp+1Ch]
0024105C 8B FB            mov         edi,ebx
0024105E F3 A5            rep movs    dword ptr es:[edi],dword ptr [esi]
00241060 66 A5            movs        word ptr es:[edi],word ptr [esi]
00241062 A4               movs        byte ptr es:[edi],byte ptr [esi]

From the assembly code, we know that CPU performs

1) Move double word (4 bytes) from source to destination memory 7 times.
2) Move word (2 bytes) from source to destination memory 1 time.
3) Move byte from source to destination memory 1 time.

How about the generated code for template_memcpy?


        template_memcpy<sizeof(src)>(dest, src);
002410C7 B9 07 00 00 00   mov         ecx,7
002410CC 8D 74 24 1C      lea         esi,[esp+1Ch]
002410D0 8B FB            mov         edi,ebx
002410D2 F3 A5            rep movs    dword ptr es:[edi],dword ptr [esi]
002410D4 66 A5            movs        word ptr es:[edi],word ptr [esi]
002410D6 A4               movs        byte ptr es:[edi],byte ptr [esi]

See. template_memcpy is as good as conventional memcpy, isn't it?

OK. So, why do we choose template_memcpy over memcpy?

template_memcpy with come in handy, when you try to perform copy on array of objects.

Instead of :-


    MyObject src[100];
    MyObject *dest = new MyObject[sizeof(src) / sizeof(src[0])];

    for(int i=0; i<(sizeof(src) / sizeof(src[0])); i++) {   
        dest[i] = src[i];  
    }    

    delete[] dest;

We may :-


    MyObject src[100];
    MyObject *dest = new MyObject[sizeof(src) / sizeof(src[0])];

    template_memcpy<sizeof(src) / sizeof(src[0])>(dest, src);

    delete[] dest;

The code seems cleaner, isn't it?

Of course, there is a shortcoming for template_memcpy. It only support memory size, which is known during compiled time :)