In an interface, I sometimes prefer to not have blank lines between the method signatures, especially getters and setters. It would be nice if the code formatting "blank lines" tab had a separate option for how many lines to put after a method signature in an interface. This might even be more useful if it covered abstract methods too. Sometimes I would like to group a few abstract methods or interface methods, that have no javadoc, together without lines between them. Also if they are interrelated methods and all covered by one javadoc comment. This would be separate from the blank lines after a method in a class.