In Eclipse editor, if I go Search->File, I can search for files that contain my search term. What I want to do is find all of the files that DO NOT contain
The simplest way imo is to use InstaSearch Eclipse plugin and type:
search text -wordToExclude -anotherWordToExclude
This expression should work (reference):
(?s)\A((?!YourSearchText).)*\Z
Try checking "regular expression" option and then input somethign like [^term] or (?!term) -- meaning of both of this is 'not term' but they are slightly different (please refer to some RegExp documentation like this).