przemelek in english...

Chrome OS and Java

2009-11-28T19:55:00.002+01:00

I made some time ago small research about Java in Chrome OS, today I continued. Last time I played with VMPlayer, now I'm running Chrome OS [for true it is Chromium OS] on my Asus EEE PC 900.

First thing is, it looks that in Chrome OS we have 2 versions of Java!
First is OpenJDK 1.6, and you may find it in directory /usr/lib/jvm/java-6-openjdk, java -version shows here OpenJDK Runtime Environment (IcedTea6 1.5) (6b16~pre5-0ubuntu2) OpenJDK Client VM (build 14.0-b16, mixed mode).
Second is GCJ 4.4, which you may find at /usr/lib/jvm/java-1.5.0-gcj-4.4, and displays this version info java version "1.5.0" jij (GNU libgcj) version 4.4.1.

It looks that in this OpenJDK Java you will not be able to run any program using Swing or AWT, any try of this will end with message:

Which says in short that Java cannot find some native library.

In GCJ Swing is working :-)

But how you can notice program is displayed in full screen mode.

I was also able to run my Java program which animate face with Gouraud shading [this link will lead you to my blog in Polish, where you may find applet which is doing the same]:

But this is REALLY slow. What you can see on movie.

That's all what we know.
We don't know if Java will be part of Chrome OS, or if it is here only by luck.
My hope is that Java will be important part of Chrome OS.

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OOo2GD in Ubuntu 9.10 - it's working.

2009-11-18T00:16:00.002+01:00

OK, from premiere of Ubuntu 9.10 I got by e-mail and other ways info that some of OOo2GD users aren't able to use OOo2GD on Ubuntu 9.10.
I tested it, and here is a result [OOo2GD with OpenOffice.org 3.1 on Ubuntu 9.10 rc 4 in VMPlayer in Windows 7]:

All what I needed to do to get it was to use command:

apt-get install openoffice.org

Which command downloaded and installed OpenOffice.org 3.1 with Java.

Next, I went to page http://extensions.services.openoffice.org/project/ooo2gd where I downloaded OOo2GD in version 1.9.0, next I installed it with Extension Manger from OO.org.

So guys, if OOo2GD doesn't work in your Ubuntu 9.10........ I'm sorry, but you must have something wrong with your configuration.

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Which language is fastest? ;-)

2009-11-14T03:37:00.004+01:00

Recently I made tests of this which programming language gives quicker code ;-)
Of course it depends from this what this code should to do.
So I choose thing which I'm writing almost always in new [new for me] language :-)

I wrote it even during my first session, over green screen [on RS232 connection] when I was first time connected to HP-UX on my University server ;-) [or maybe not??? I'm not sure now ;-)]

This thing is simple numerical integration of function f(x)=e^-x² in range (-10,10> [when calculated form minus infinity to plus infinity result is equals to square root from Pi :-), I was really impressed when my professor showed it to us on our lecture from mathematical analysis]. Those calculations are performed in 10000 of steps, and repeated 1000 times for stable result [so we measure time of 1000 iterations from 0 to 9999] and divide result by 1000 to get information about time needed to calculate one iteration.

If you are interested in source codes of programs I wrote for those tests, please use one of those links [those are links to my blog in Polish, but you needn't be afraid ;-) you are interested only in source codes] sources for Java, Python, C, and C# [here you may find ZIP file with some of those programs], sources for JavaScript [here is a simple JavaScript tester, which will display info how long took one full iteration for calculate this numerical integration], and finally sources for Go [here you need to be warned, that this Go program should have changed one line, where math.Exp() is used, it should use math.Pow()].

And results are interesting ;-)

C++ 32bit - 0.985 ms
C++ 64bit - 1.387 ms
JavaScript from Mozilla Firefox 3.5.4 - 1.380 ms
JavaScript from Google Chrome 4.0.223.11 - 2.514 ms
Java 64bit - 3.8 ms
Java 32bit - 4.7 ms
Google Go 32bit - 8.521 (5.68) ms
Python 2.5.2 32bit - 10.3 ms
Python 2.5.4 64bit - 10.16 ms
C# 64bit - 14 ms

All tests except test for Go was performed on my 64 bit Windows 7 laptop with Core 2 Duo processor, Go was tested on virtual Ubuntu 9.10 in VMware Player 3.0 hosted on Windows 7, in case of Go first result [8.521 ms] is a result shown by test program, second result [5.68 ms] was calculated by comparing results of JavaScript from Firefox on Windows 7 and in this virtual Ubuntu 9.10.
C++ code was compiled with Visual C++ 2008 Express Edition [for 64 bits I used compiler from Windows 7 SDK, here instruction how to make Visual C++ 2008 Express Edition to use it :-)]

The biggest surprise for me was really poor result of C#, and superb result of JavaScript in FireFox :-) I still don't know why JS was so fast :-) [interesting thing also is this that FireFox JavaScript was here faster than Google Chrome JavaScript ;-)}
Result of Go wasn't so surprising, now after the premiere of this language we can here only praises, but its still experimental thing, and I used 32 bit version of compiler which isn't the best ;-) [I must also admit that after my first experience with Go I don't like it and I hope this one Google project will die].

I think that good advice after this test is ;-) If you need to write some very quick code use C++, if it must be fast but needn't to be extremal fast - use Java, and newer use C# ;-)

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OOo2GD 1.9.0, let's try to be seamless ;-)

2009-11-12T20:23:00.003+01:00

Nothing big today, but rather useful ;-)

First, in configuration window you may find new checkbox, for overwriting files during download.

What's for? Thanks to this you will be able to avoid downloading a lot of files with similar names, example now when you have document called "test" in Google Docs, and you try to download it several times, you will end with file test.odt, test(1).odt, test(2).odt, test(3).odt and so on.

This change will help you in using second change ;-) From now OOo2GD will try to be smart, and when you will want to export file to Google Docs it will try to find in Google Docs item with most similar name, and will set itself to update this item, you can still decide that you want to upload new item.

Last but not least change is try to reuse once obtained information, example you open import window, and use Refresh List button, next you close import window and open it again... now OOo2GD will try to use existing list of documents instead displaying empty list and making you click on refresh list. You can still use Refresh List to refresh it ;-)

Hope you will find those changes useful :-)

You can visit project page, or download newest version :-)

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OOo2GD 1.8.2

2009-10-25T20:04:00.003+01:00

What new?

Removed annoying window displayed after upload of file, instead of this you can see "status" of operation in progress window

New button Download in Import window, this button let you download file without opening it in OO.org, downloading will be performed with format chosen in selector above.

Fixes:

Fixed handling of file names with #, now it should work :-)

As always you may download or visit project page :-)

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OOo2GD 1.8.1 - 2 fixes

2009-10-06T00:16:00.003+02:00

First fix is for downloading presentations from Google Docs. It seems that address for downloading presentations was changed and OOo2GD follows this change.
Second is for filtering items seen in import window. Now those items will be filtered to documents, spreadsheets and presentations only.

As always I invite you to download, from OOo2GD page in OpenOffice.org extensions repository [to now it was downloaded almost 177 thousands times :-)] or from project page.

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Download your document in choosen format from Google Docs with OOo2GD 1.8.0 :-)

2009-10-03T17:55:00.001+02:00

Two changes, first is adding support for downloading files from Google Docs in choosen format, this should help to preserve more complicated formating [I think Google Docs is the best in exporting MS Word documents]

You can choose format for spreadsheets and documents, for presentation you are able to select only PPT ;-)
GUI isn't obvious but shouldn't be difficult to understand.

Second change is return of refresh "icon", on button for refreshing list of documents in Upload window.

We have here also some small internal changes, the most significant is change of this how OOo2GD will report itself to Google Docs.

As always I invite you to download, from OOo2GD page in OpenOffice.org extensions repository [to now it was downloaded almost 177 thousands times :-)] or from project page.

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OOo2GD 1.7.2

2009-08-14T15:54:00.004+02:00

In this version OOo2GD is packed with newest Google Client Libraries.
Thanks to this it increased it size from 1.1 MB to 2.3 MB ;-) but also should work better with Google Docs servers.

Download

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"Information animal" ;-)

2009-07-31T23:40:00.002+02:00

Two day ago or so I made test on GoArmy.com, I was curious who I might to be in US Army ;-)
And results are interesting ;-) it looks that my way of life should be work with information in intelligence ;-)

My results are here:

Human Intelligence Collector (35M) - The Human Intelligence Collector is primarily responsible for supervising and conducting information collection operations. They are integral to providing Army personnel with information about enemy forces and potential battle areas.

Intelligence Analyst (35F) - The Intelligence Analyst is primarily responsible for supervising, coordinating and participating in the analysis, processing and distribution of strategic and tactical intelligence.

Signals Collector/Analyst (35S) - The Signals Collector/Analyst is primarily responsible for performing and supervising the detection, acquisition, location and identification of foreign electronic intelligence.

Signals Intelligence Analyst (35N) - An Signals Intelligence Analyst listen to and intercept foreign radio transmissions and relay that information by producing combat, strategic and tactical intelligence reports.

It's nice to read something like this :-) I was never interested in military career, and I think I'm too talkative to work in intelligence but those results are nice ;-)
I always liked to thing about myself as "information animal" ;-) and it looks that it is something in this ;-)

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OOo2GD 1.7.1

2009-07-29T00:11:00.002+02:00

New version OOo2GD 1.7.1 is available :-)
Fixes:

fixed problem with file names, when document has some strange characters in name OOo2GD will try to convert those characters to underscore "_"

fixed problem with opening documents with spaces in name on Mac OS [not tested]

Download :-)

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Mac OS users - call for help :-)

2009-07-25T00:30:00.005+02:00

Dear Mac OS users I need your help :-)
For now biggest problem for OOo2GD on Mac OS is opening downloaded documents in OO.org.

I can do it for files without spaces in name, but I want to add possibility to open files with spaces in name.

And here I need your help. Here you may find ZIP archive with two files.
Those two files are:
MacOsTester.jar
plik ze spacjmi w nazwie.ods [it's in Polish "file with space in name.ods", but word space is misspelled ;-)]

You need to unpack it somewhere on your HDD, and click on MacOsTester.jar.
After click you should see something like this:

Next you need to click on all buttons from Metoda 1 to Metoda 11. You should note all buttons which will open your OpenOffice.org with spreadsheet looking like this:

For test you will need OpenOffice.org on Mac OS :-) and Java 5.0.

Fell free to share with results in comments to this post or send me e-mail to address .

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What sux in G1?

2009-07-14T00:20:00.002+02:00

Battery.
Really, HTC should think about version with battery ;-)
Current one is similar to UPS, it helps between short moments when you are not connected to proper power source ;-)
With old Nokia or Alcatel [both proud European companies :-)] I had about a week of work without charging, with G1 it's a day.

Finger marks on screen.
When you see G1 which is used by someone else you start to wonder why this person didn't wash her hands. Whole screen is covered with marks of fingers. It looks disgusting.
When you owe G1 you start to understand it ;-) Wash your hands and next try to input unlocking pattern ;-) But even with those clean hands your fingers will left ugly tracks on screen.

Responsiveness.
Or rather the fact that from time to time you may met on G1 lack of responsiveness. Here are some hard moments when you can see your wallpaper and you need to wait.... and wait... and wait....
But here it is common behavior of many mobile devices. For me it looks that during development those devices are quick and everything works nice and smooth, but in next phase when those wonderful devices are converted to versions for real world market they met physics laws, and what become worser, economy laws. So designers throw out from those devices quicker CPUs because users have strange habit to keep phone disconnected from power line, they threw out also normal batteries, because those batteries costs more, and weights more too ;-)

But considering all this, I must say that G1 is coolest piece of mobile equipment I ever had. It's true GeekPhone :-)

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How to create valid file name?

2009-07-06T01:37:00.002+02:00

During development of OOo2GD I met some non-trivial problem.
In Google Docs you may use almost all characters in title of document, but you cannot use all those characters in file name. This means that when user wants to download document to local machine you need sometimes to convert title to file name.... And of course we want to make sure that file name will be as much similar to document title as it is possible.

I thought about two possible ways, first by creating smallest common caharset for all operating systems [or rather file systems]. Second by narrowing available charset in steps.
I choose 2nd way, and decided that first I will try to remove only ":", if it will not help I will try to remove some bigger set of characters, and if it will not help too I will keep only latin letters and digits.

Here is code which I'm using :-)

public static String findAvailableFileName(String destFileURI) {
    String destFileName = destFileURI.substring(0,destFileURI.lastIndexOf("."));
    String destFileExt = destFileURI.substring(destFileURI.lastIndexOf(".")+1);
    int count = 1;      
    File f;
    while ((f=new File(destFileURI)).exists()) {
        destFileURI=destFileName+"("+(count++)+")"+"."+destFileExt;
    }            
    String fName = f.getName();
    String fPath = f.getParent();
    // Now we need to check if given file name is valid for file system, and if it isn't we need to convert it to valid form
    if (!(testIfFileNameIsValid(destFileURI))) {
        List forbiddenCharsPatterns = new ArrayList();
        forbiddenCharsPatterns.add("[:]+"); // Mac OS, but it looks that also Windows XP
        forbiddenCharsPatterns.add("[\\*\"/\\\\\\[\\]\\:\\;\\|\\=\\,]+");  // Windows
        forbiddenCharsPatterns.add("[^\\w\\d\\.]+");  // last chance... only latin letters and digits
        for (String pattern:forbiddenCharsPatterns) {
            String nameToTest = fName;
            nameToTest = nameToTest.replaceAll(pattern, "_");
            destFileURI=fPath+"/"+nameToTest;
            count=1;
            destFileName = destFileURI.substring(0,destFileURI.lastIndexOf("."));
            destFileExt = destFileURI.substring(destFileURI.lastIndexOf(".")+1);
            while ((f=new File(destFileURI)).exists()) {
                destFileURI=destFileName+"("+(count++)+")"+"."+destFileExt;
                }
                if (testIfFileNameIsValid(destFileURI)) break;
        }
    }         
    return destFileURI;
}
    
private static boolean testIfFileNameIsValid(String destFileURI) {
    boolean valid = false;
    try {
        File candidate = new File(destFileURI);                
        String canonicalPath = candidate.getCanonicalPath();                
        boolean b = candidate.createNewFile();
        if (b) {
            candidate.delete();
        }
        valid = true;
    } catch (IOException ioEx) { }
    return valid;
}

Here nicer form of sources ;-)

Because whole operation in code above is performed on file path in first step I remove all / and \...

Additionally this code returns "first free" file name. So if you are trying to save file "test.odt" to directory where file with this name exists, this code will test first if "test.odt" is available, if not it will try "test(1).odt", next "test(2).odt" and so on.

Feel free to comment :-)

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OOo2GD 1.7.0

2009-06-28T19:20:00.003+02:00

After long period, we have it :-) New version v1.7.0 of OOo2GD :-)

What's new?

French version

all compiled for Java 5

unofficial MacOS support - it means, that it sometimes works, and sometimes not ;-)

Fixes:

fixed problem with downloading spreadsheets from Google Apps accounts

fixed handling of langauges

Additionally in this version you may find support for external translations. Put your translation to home directory [in Windows it is C:\Documents and Settings\<user>\] and from next restart of OO.org OOo2GD should use your translation. This is introduction for on-line editor of translations.

Download.

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Codename: Stokrotka - next test version of 1.7.0, this time without bug ;-)

2009-05-28T00:18:00.002+02:00

My fault, last time I didn't attached one important file to distributed OXT file. This missing file was activtation.jar, which is shipped with Java 6, but isn't with Java 5.

I probably should find it during tests, but my laptop is rather slow, so I prefer not to make anything what will take a lot time [so restarting OpenOffice.org and so on ;-)].

What means "stokrotka"?
It is Polish name for daisy, codename is to official name for my method to avoid mixing files.

MacOS:
It should be able to upload files [without conversion from unsupported format to supported by Google Docs], and to download files, I made also changes to open those downloaded files, but I wasn't yet able to test it.

Have fun!
Download [I'm waiting for feedback]

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Early access version of OOo2GD 1.7.0 with partial MacOS support

2009-05-26T00:15:00.003+02:00

I decided to publish very early version of OOo2GD 1.7.0.
Differences to previous versions are:

compiled for Java 1.5, thanks to this it may work on MacOS [read more below]
changed method of displaying message windows [users of Windows, and probably also Linux and Solaris shouldn't notice any difference]
changed localization of gdocs.update.xml file [was http://przemelek.googlepages.com/gdcos.update.xml, will be http://www.przemelek.pl/gdocs.update.xml]
Small changes in Bulgarian translation

MacOS support:
This is tricky one ;-)
Tests shows that on some systems uploading works [but as I suppose without automatic conversion after prompt that conversion is needed]. Downloading works, but it may have some problems with opening downloaded file in OO.org.
You may ask why I decided to publish this version if it doesn't work.
Answer is easy: I didn't have Mac [and looking on behavior of Apple Java I'm happy with this ;-)] so I'm not able to test it myself. I hope Mac owners will try how it works and will share with comments how it worked [or not ;-)]

~~Download~~
New Download [this version works on Java 5 :-)] [and pleas give me feedback how it works :-)]

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OOo2GD 1.6.0 :-)

2009-04-08T23:14:00.002+02:00

Finally I gather almost all translations and here it is! New version 1.6.0 of OpenOffice.org2GoogleDocs.

New:

autoconversion [but with prompt] of unsupported by Google Docs and Zoho formats to supported,
new translation to Simplified Chinese created by Steven (YoUZoU)

Also autoupdate should start to work. Earlier it didn't work because OpenOffice.org doesn't like Google Code servers... for now I moved OXT file to OpenOffice.org serves and autoupdate should start to work :-)

Download

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I'm on Twitter ;-)

2009-04-06T22:41:00.002+02:00

I just started using of Twitter. I'm still not sure if I understand how it works ;-)
But I found that some of my twits disappeared... It's about 10% of my twits...

If you are interested in my egocentric twits please follow me on Twitter ;-)

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Praise your PM! :-)

2009-04-06T22:35:00.002+02:00

I'm currently working on version 1.6.0 of OpenOffice.org2GoogleDocs. Whole coding has taken about 4 hours, but coordination of translations took about a week, and it's ready in about 87.5% ;-)
I think that we - developers, development leads, etc. should build statues for our PMs :-) Without them our work would be much difficult than it is :-)

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OOo2GD 1.5.1 Birthday Edition ;-)

2009-03-19T23:39:00.002+01:00

In my birthday I want to give you all a present :-) New version of OOo2GD :-)

In version 1.5.1 you may find one new features, possibility to decide where downloaded files should be stored on your hard drive. You may choose global location, or you may choose option when OOo2GD will ask you for each file :-)

Download

Currently I'm working on some tool for synchronizing folders with Google Docs and Zoho. I think this tool will work also under Mac OS ;-)
I'm not sure if this new tool will be distributed under LGPL, but it will be free [at least in basic version :-)].
I have crisis of believe in LGPL because last week some "ugly" people started "business" with selling my plug-in to widely known and used in Poland instant messanger Gadu-Gadu. My plug-in called Gadacz [it's simple tool which connect IM with speech synthesizer] was sell without my permission, additionally those people was selling it via SMS, and theirs customers was sure that they will pay only 1.22 PLN [0.36 USD] but truly SMS cost 23.18 PLN [6.85 USD].
Very unpleasant situation.
I distributed Gadacz for free on my own license, but some people suggested that it is on LGPL and suggested that with LGPL someone may took my work, and start to sell it without any changes and my permission.

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2009-03-10T00:51:00.005+01:00

Eventually I know why OOo2GD doesn't work on MacOS.

OpenOffice.org for Mac OS is 32 bit application, Apple Java 6.0 for Mac OS 10.5 is 64 bit application. It looks that on Mac OS, exactly the same like on Windows, 32 bit applications cannot use 64 bit Java. Because of this even if OpenOffice.org pointed to Apple Java 6.0 it was truly using Java 5.0 and OOo2GD wasn't able to work.

I compiled some special version [without some features] for Java 5.0 and this version was able to run on Mac OS 10.5 [I have screenshots :-)]

For now this version isn't perfect.
Download doesn't work [but files are downloaded and written on disk, OOo2GD cannot open those files in OpenOffice.org and hangs OO.org ;-)], on some system also upload doesn't work.
Changing of interface language doesn't work, whatever you choose it will be always English ;-)
Some fonts looks strange.
Buttons "Open in Browser" and "Open via Browser" doesn't work [the same as links for my pages ;-)] because of using Java 5.

I still don't know what I will do with version for MacOS, but most probable for now is that I will prepare some special Java 5 version of AddOn [I hope I will be able to keep as many features as possible].

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OOo2GD 1.5.0 - we can download spreadsheets :-)

2009-02-21T16:15:00.003+01:00

The recent changes in Google Docs API give us oportunity to perform fully supported downloading from Google Docs. Thanks to this from version 1.5.0 OOo2GD supports downloading of documents, presentations and [tada!!] spreadsheets :-)
Downloading will work for regular Google Docs accounts as for Google Apps accounts.

Changes in 1.5.0:

downloading of spreadsheets/li>
downloading from Google Apps accounts

change of directory to download files, it was temporary directory, from now it will be user directory

automagic renaming of file names, if in directory where file is downloaded we have file with the same name, we will save our downloaded file under other name

next changes in "thread model" of OOo2GD, thanks to this we should finally eliminate "no object DCH for MIME type application/atom+xml"

Download :-)

As shows results of survey, most of OOo2GD users [94%] uses it mainly to work with Google Docs.

For now I try to find out a way to add support for MacOS... Apple want to be original and they had theirs own Java, and for now OOo2GD don't work with MacOS.
I'm thinking also about some new features, one of those features is automagic synchronization, but for now it's only idea ;-)

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OOo2GD 1.7.0
Early access version of OOo2GD 1.7.0 with partial MacOS support
OOo2GD 1.5.1 Birthday Edition ;-)
Download your document in choosen format from Google Docs with OOo2GD 1.8.0 :-)
OpenOffice.org2GoogleDocs and Apple - first try ;-)

OOo2GD 1.4.2

2009-01-22T11:59:00.000+01:00

Brand new version 1.4.2 of OOo2GD is available :-)

In this version we have new fix, thanks to this fix when you will download documents or presentations from Google Docs OOo2GD will add automagically file extension when it is needed. It let you to avoid manual adding of file extension when you will want to export this file to Google Docs.

Download

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Export documents to Box.net from your OpenOffice.org with OOo2GD :-)

2009-01-11T17:38:00.004+01:00

Did you know that you may use OpenOffice.org2GoogleDocs to export your documents to Box.net?

To do it you will need to use Export to WebDAV icon:

As a WebDAV server path put http://www.box.net/dav/ :

Click OK :-) During uploading you will be asked for your Box.net account login name and password, put it and click OK, you may also check "Remember Password..." field:

After uploading your file will be able on Box.net :-)

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OpenOffice.org2GoogleDocs 1.3 beta 1 - update documents on Google Docs
Mac OS users - call for help :-)
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OOo2GD 1.9.0, let's try to be seamless ;-)

OpenOffice.org2GoogleDocs 1.4.1

2009-01-11T13:11:00.002+01:00

New day and new version ;-) This time it is 1.4.1. In this version I fixed little and nasty problem which caused that in some rare occasions users got error Problem: no object DCH for MIME application /atom+XML instead of uploading files to Google Docs.

Problem was caused by the fact that in some cases Swing EDT thread might be started with "wrong" ClassLoader, and wasn't able to access libraries needed to contact with Google Docs. This version should fix this problem.

Download

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Not sa ugly API ;-)
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Chrome OS and Java
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