Developing DL-Learner using Eclipse

Instructions on how to prepare Eclipse for developing DL-Learner:

1. Make sure you have Java 6 and Eclipse installed.
2. Install the Subclipse Plugin for Subversion support.
3. “File >> New >> Project” >> “Checkout Projects from SVN”
4. Repository Location: http://dl-learner.svn.sourceforge.net/svnroot/dl-learner
5. Choose “trunk” and “Finish”.
6. Another project creation wizard should start now. We choose “Java Project”.
7. Project name “DL-Learner” (of course you can use a different name). Choose “Next”.
8. Note: The next two steps can also be done later, after all the files have been downloaded from SVN. To access them just right click on the project and change the project settings (Java Build Path, tab Source). (Optionally you can just remove all source folders and then go to «src/dl-learner» right-click >> "Build Path" >> “use as source-folder”.)
9. Now you need to add src/dl-learner/ as only source folder in the project. (If Eclipse, for instance, has src/ as source folder by default then disable it – the package symbol disappears – and add src/dl-learner/.)
10. Choose DL-Learner/classes/ as output folder (or $project/classes if you used a different project name). Click “Finish”.
11. Eclipse now checks out, so wait for a while. Then select your project in the package explorer and go to “Project” >> “Properties” >> “Java Build Path” >> “Libraries”. Click Add JARs there and add all JARs in the lib folder (you can select several at once using the Ctrl key).
12. Go to “Project” >> “Properties” >> “Java Compiler” >> “Compiler Compliance Level” and set it to 6.0. (Previous compiler levels will report errors.)

You should now be ready to develop DL-Learner in Eclipse. DL-Learner uses the standard code conventions with the only difference that the maximum line length is 100 instead of 80 (Project >> Properties >> Java Code Style >> Formatter >> Edit >> Line Wrapping Tab >> enter “100” as maximum).

Similar instructions apply to other IDEs.