negative « Operation « Java Regex Q&A

1. Negative look ahead java    stackoverflow.com

I need an expression to capture a string like this "A"[A string that is NOT atleast 5 and atmost 6 digits]"B", In other words capture anything that is NOT the following A[0-9][0-9][0-9][0-9][0-9]B
A[0-9][0-9][0-9][0-9][0-9][0-9]B I have ...

2. How to make negative lookahead work with end of line text    stackoverflow.com

I have a regex like the following:

.{0,1000}(?!(xa7|para(graf))$)

3. Negative lookahead regex not working    stackoverflow.com

input1="caused/VBN by/IN thyroid disorder"

4. Regex: Keep Single dashes Negative Lookahead    coderanch.com

I am breaking a text file into words for processing. But I want to treat as a single word words that contain a single dash. For example "Oh-wow" should be one word and "But--not--this" should be three words. The double dashes could be at the start, middle or end of a word. I think I need to use negative look ahead, ...

5. String split with regex, non-capturing negative lookbehind    forums.oracle.com

6. Regular Expressions Negative Lookbehind Question (?    forums.oracle.com

Does anyone know how to use a variable length negative lookbehind using the Java Pattern Matcher? I was able to get a variable length negative lookahead working using the following regex syntax (?!.{0,30}(pattern)) and I would like to do something similar for a negative lookbehind (?