Opening a client file - Mail attachments for example

Building a swing client mail application has one huge hickup and can't think of a good solution. How do you automatically open an email attachment?? If its a .doc document, it should open a word document automatically instead of reinventing the wheel and code some Java RTF viewer.
A lot of attachments are compressed, you mean you have to code it all in Java? That would be absurd? With 100 now common mime types, anyone have any good suggestions of doing this.
For example - Would the windows "start" command be a good idea to simply open the folder if not a text/html or image (gif/jpg) file?
What about linux and unix and mac?? Whats the OS command to open the mail cache attachments folder? Not happy that Java doesn't support a native method to open a file. Why is that?
Hope people reply to this and bring some ideas that are effective and would not be too troublesome to implement or re-invent the wheel??
Thanks
Abraham Khalil

If you peruse cross-platform browsers and mail clients (like Mozilla), you'll see that most provide in their editable configurations a mapping of mime-types to applications. Using this, a user can specify what command to give to the hosting platform to execute when a mime-type is opened.
Some platforms, like windows, provide a mime-type mapping service. You can add platform specific code to take advantage of this. Mozilla allows you to, for a mime-type, specify the default application from the platform or your own.
Compressed files also have their own mime-type, so the associated application would take care of that.
I hope you find this of some help.

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Opening a client file problem

Building a swing client mail application has one huge hickup and can't think of a good solution. How do you automatically open an email attachment?? If its a .doc document, it should open a word document automatically instead of reinventing the wheel and code some Java RTF viewer.
A lot of attachments are compressed, you mean you have to code it all in Java? That would be absurd? With 100 now common mime types, anyone have any good suggestions of doing this.
For example - Would the windows "start" command be a good idea to simply open the folder if not a text/html or image (gif/jpg) file?
What about linux and unix and mac?? Whats the OS command to open the mail cache attachments folder? Not happy that Java doesn't support a native method to open a file. Why is that?
Hope people reply to this and bring some ideas that are effective and would not be too troublesome to implement or re-invent the wheel??
Thanks
Abraham Khalil

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I haven't researched this thoroughly enough to explain how it works, but I researched it enough to produce working code. This worked on... let me see... Windows 2000, 98, and Mac (running 1.3.1, but it should work with 1.4.2 too).
Note this referenecs a few of my own classes...
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