About

de·caff provides Java programs, some with source code included, and a small blog about advanced Java topics.

Why de·caff?

Java's package naming convention states that every Java programmer should place her classes in a package starting with the reverse of her email's address internet domain thus avoiding name clashes. So every package by anyone from caff.de has to start with de.caff which matches the attitude of your host who never drinks coffee.

Latest News

2016/09/22 Thu, Sep 22, 2016

Eventually the source code of the de·caff Viewer and libraries based on this code are available for commercial licensing again.

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2016/05/20 Fri, May 20, 2016

This site was relaunched and the new de·caff Viewer is finally out.

Time for a nice cup of Darjeeling…

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Projects

All Projects ...

de·caff Viewer Tue, Nov 9, 2021

Version 3.15.03

The de·caff Viewer version 3.x is a pure Java program for viewing AutoCAD® DWG, DXF and SHX files.

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DWGPROPS Tool Thu, Feb 28, 2019

Version 2019-02-28 17:31

The DWGPROPS tool is a Java command line tool for extracting meta information from DWG and DXF files.

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de·caff Commons Fri, May 20, 2016

The de·caff Commons provide a wild mix of open source Java classes used in various projects on this site.

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Blog

All Blog Postings ...

Overview Fri, Sep 18, 2020

This gives an overview of posts you can find on this website.

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Combining Predicate Types Thu, Sep 17, 2020

The Java Predicate class provides default methods for combining predicates with logical and and logical or, but they don’t always work as expected.

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4X4 Matrix Decomposition Tue, Apr 14, 2020

I was in need to decompose transformations given as 4X4 matrices into simpler ones. What I found on the web wasn’t suiting my need for understanding what I’m doing. So I had to figure it out myself.

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