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I'm developing application which needs to get details from AutoCAD DXF file. Is there any specific API which support this task. Actually in my project I need to get building structures to my java application and I need to add some more details to those graphs So can some one provide your experience about this ?
A quick Google search on java dxf yields the ycad library. I have never used it, I don't know how well it works.
http://caff.de/dxfviewer/ supports reading DXF files.
The reading of an AutoCAD DXF file is not a trivial task. The contained entities can be affected by the coordinate systems, the blocks can be hierarchycal, etc. When I wrote my DXF importer, I read the file sequentialy, built a DXF DOM and then converted it into my own format. You can find the document specification here:
http://images.autodesk.com/adsk/files/autocad_2012_pdf_dxf-reference_enu.pdf
http://www.autodesk.com/techpubs/autocad/acadr14/dxf/dxf_reference.htm
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I am working on a program which gathers data and stores it in a file. I need to be able to write a program which reads from the created file and plots a scatter/bar/pie graph from it. Does anyone know any Graphing Libraries which I can use to do this? I've seen suggestions for libraries which can graph nodes, vertices etc. but none for common graphs. Help would be appreciated. Thanks
For charts you can use JFreeChart. It is an open sorce java library with a good API.
If you want to draw graphs (trees for example) you can use JGraphX which is also an open source library.
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Does anyone know a good library/jar to parse RSS/Atom Feeds?
I'd like to stuff a URL in, and want to get the news-items in a homogenous way. (Means: it should not matter whether the Source contains an Atom or RSS feed. I just want "Items" back.)
After browsing on SO, I came up with ROME, but it seems to be chaotic at the moment (no download for example), and is a pure Java solution. Scala would be preferred, but Java is quite okay if nothing Scala-specific exists. Also, it should be a single JAR Library, since I don't use Maven etc.
PS: It's not for Android, just for a good old desktop app.
EDIT: To be more clear, I already know how to get the content from resources as XML. I want to parse them! Autodetect whether it's Atom or some RSS and give me back a uniform list of items.
Have you checked out Dispatch? It doesn't have any RSS/Atom features built in per se, but you should be able to handle the response text as a scala.xml.NodeSeq and do whatever you need.
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I want to develop an eBook reader app. What are some good libraries available to parse formats like .azw, .mobi, .pdf etc.?
As Ranhiru said, here and here you can see how PDFs are parsed.
For .mobi, however, there is no library, so you'll have to parse the format yourself. A full specification of the format can be read on the mobileread wiki.
With .azw files, it's different: if the Kindle ebook is DRM-free, then its format coincides with the .mobi one, i.e. they are absolutely interchangeable. Otherwise, it's very difficult to do, since you'll also have to generate a Kindle PID and perform the de-DRM-ing of the .azw file. There's a guide on how to do that on the desktop here. However, it is strongly not recommended, since it breaks the whole point of DRM and is illegal pretty much everywhere.
For mobi there isn't complete spec sheet available, but you should directly jump into PDB format which is extended & used by MOBI
http://jola.comm.pl/palm/opispdb.htm
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I am looking for a translator for translate Java ByteCode to Machine Native Code before execution to improve performance.
I heard that OpenOffice is made with JAVA, but I can't see any jar file in his installation folder, therefore, maybe there is a translator but I can't find it.
Does anyone know some tool or comercial product to do that?
Thanks!
There are multiple solutions. All are not ideal.
Take a look here (exe4j). To learn more read this article.
Give a look to Avian JVM. See my reply here to this question for pointers on how to embed it and what class libraries you can use to generate your stand-alone executable.
if you just need a managed language/platform, you can also use .NET/Mono AOT. See the mkbundle tool included with Mono 2.x.
Please have a look into https://www.graalvm.org/.
It could build a native image from your jar and run it as binary (native code).
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I am using Java in eclipse, It would be wonderful if I could find a plug in which can draw state chart from a XML format.
I don't know about plug-ins for Eclipse, but I'd recommend AT&T's graphviz as a terrific tool for easily rendering states and transitions. The input format is not XML; however, it'd be trivial to read an XML file, generate the required format, and render it using graphviz. Laszlo Szathmary has a nice Java class that lets you do it right inside a Java class - very nice.
Check out Eclipse's Graphical Editing Framework(GEF). It should have everything you need. http://www.eclipse.org/gef/overview.html