Java Regex for matching quoted string with escaped quotes

Question

I know there are already many questions like mine but I found no answer which works in Java. So I write a new question.

I have text files with content like this:

Answer 1

Try this regular expression:

'([^\\']+|\\([btnfr"'\\]|[0-3]?[0-7]{1,2}|u[0-9a-fA-F]{4}))*'|"([^\\"]+|\\([btnfr"'\\]|[0-3]?[0-7]{1,2}|u[0-9a-fA-F]{4}))*"

And as a string literal:

"'([^\\\\']+|\\\\([btnfr\"'\\\\]|[0-3]?[0-7]{1,2}|u[0-9a-fA-F]{4}))*'|\"([^\\\\\"]+|\\\\([btnfr\"'\\\\]|[0-3]?[0-7]{1,2}|u[0-9a-fA-F]{4}))*\""