Launching external viewer per file type

From my Java program I need to launch external viewers per file type. Is there any easy way to do this?
My program may generate various output files (eg. html, txt, pdf ...etc). Once a file is generated, I want to launch corresponding registered viewer on users desktop so user can view the output(eg. for "HTML" registered web browser OR for TXT launch Notepad OR for PDF launch Acrobat etc).
I suspect that this functionality may become OS-dependent but maybe somebody knows a "pure java" way of doing this?
Even if I could do it for Windows only that'd be get me by for the moment. If somebody knows a Window's specific solution even that would help.
TIA.

Actually after some more searching I stumbled upon this at javaworld.
On Windows one can execute url.dll that interpretes the given file (or URL) argument and launches appropriate viewer.
For example to launch HTML viewer you execute the following command using runtime..
rundll32 url.dll,FileProtocolHandler http://www.javaworld.comTo launch notepad you use the following command.
rundll32 url.dll,FileProtocolHandler C:\myfile.txtThought it might be useful for anybody else reading this thread...

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External Editor - New File Type

Is there a way that you can set an external editor and specify a specific file type that is not listed in the 'File Type' section of preferences.
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Rob,
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Mihalis.

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I'd like to use bridge since it is faster for previewing and changing meta data, etc
If the files don't show in the content window they probably are not supported. First try a purge cache for folder using the tool menu / cache/ purge cache for folder and if still no luck check the file type associations in the Bridge preferences.
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Hi,
I have just started using Aperture, so far very pleased but have some questions so thought I would ask the experts.
1. I have selected Elements 10 as an external editor, when I select to edit aperture creates a PSD file and starts Element 10 but does not open the file to be edited. I then have problems finding the file on my iMac.
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http://barbarabrundage.com/2011/10/05/adobe-hide-and-seek-setting-pse-10-as-exte rnal-editor/
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2. Once I have found the file and edited it, if I save the file it places a modified PSD file back in the original folder but the PSD file is massive is there any other way to edit and keep in JPG format
Sorry, no. When you use an external Editor, you can only use tiff or PSD as format. Aperture will use the best lossless format. If you want jpeg, export the edited version as jpeg and reimport it.
3. The reason to edit in Elements is so I can crop to specific print sizes and ensure the image is 300 dpi. I can see in Aperture how to crop to a size but I need the result to be at 300dpi as the printer company I use will re-crop to give 300 dpi.
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Léonie

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One important aspect was to view the file type, bit rate, and sample rate as I'm a band/audio producer.
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If I understand correctly, you want to embed external files (word, pdf, image etc.) into a report in Reporting Services. If in this scenario, I suggest that you can use the following two methods to achieve your requirement:
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Katherine Xiong
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Launching external viewer per file type

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