How to take image(screenshot) of first page of any file

Hi all,
I am doing a project work and I need to take the image(just as screenshot) of the first page of any file so that contents of that first page can be viewed by that image .
And finally i want to set that image as an icon for that file.
I have used "java.awt.Robot" class for taking desktop screenshot but I am not able to find out the way how we can take image of first page of any file by just giving the url of that file even if file is closed. Can any one help me? Waiting for your kind reply..........
Thanks in advance!!

Please don't double-post. http://forums.sun.com/thread.jspa?threadID=5430733&tstart=0
Are you asking whether you can take an icon from a file in the filesystem and store and subsequently display it? Conceptually, not a problem. You would want to determine the extension and then use either JNA or JNI to access the registry (or use an existing API [http://www.dzone.com/links/access_windows_registry_using_pure_java.html]) and find where that extension is associated to a file type. That is usually linked to another registry key that has the icon to display (and its path). Use a FileInputStream to get that icon on the filesystem. You can Google around for how to navigate the Registry, I'm not a Microsoft expert, but I know it can be done.
Or are you asking whether the contents of the first "page" of an arbitrary file (Word doc, PDF, image, etc.) can be discerned and then stored and subsequently displayed? If this is the requirement, it will be very difficult to support more than a few formats. And many formats that are native to a given O/S will cause you issues.
- Saish

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How to take image(screenshot) of first page of any file

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