Converting between file types w/ Java

[IwishIcouldprog]

Hello,

I am looking for java programs (with source) that do the following :

Convert Word to text from Java
Convert HTML to text with correct layout and spacing
Call Visual Basic or C++ from Java
~Found kind of here, still need help with calling vb [L=http://www.javaworld.com/javaworld/javatips/jw-javatip17.html]http://www.javaworld.com/javaworld/javatips/jw-javatip17.html[/L]
Convert PDF to text from Java
~Found on sourceforge.net - pdfbox
Convert PowerPoint to text from Java

I am working on a project and we are doing the feasibility analysis of certain features...so that's why I need the open source.

[CornedBee]

Word to text and PowerPoint to text will probably not be out there. Both formats are closed and to actually read them you have to try and reverse-engineer them. That's an extremely tedious process, so it's unlikely that anyone would go through it without a good reason to. The people of OpenOffice did it, for example, but their code is in C++.

Calling VB from Java...
In theory, it shouldn't be too hard. Sun offers or offered for free (but I don't think open source) a wrapper that reflects Java Beans into ActiveX - which is what VB classes are in the end. Doing the reverse ought not to be too hard. You would do it with some native modules for Java written in C++, that read a type library and inject the resulting information into the virtual machine. I can give you some hints there.

As for calling C++ from Java, you only have to write a wrapper for the C++ classes in JNI.

Converting HTML to text requires an HTML parser and a formatter. How hard this is is merely a question of how sophisticated you want it to be. Should it interpret CSS? Should it basically act as a text browser outputting into a text file?

Oh, and the tag for links is URL, not L.