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If you look in (project root)/res/ide-support/eclipse/java-compiler-errors-warnings.txt, you'll see a set of compiler warnings and import organization rules that you will have to set up manually in your project. If you set those up properly, you are more likely to submit cleaner patches.

A full explanation for Tomcat in Eclipse can be found here:
Tomcat 7.0.x: http://tomcat.apache.org/tomcat-7.0-doc/building.html#Building_with_Eclipse Tomcat 6.0.x: http://tomcat.apache.org/tomcat-6.0-doc/building.html#Building_with_Eclipse

Debugging

How do I configure Tomcat to support remote debugging?

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