This week's book giveaways are in the Refactoring and Agile forums. We're giving away four copies each of Re-engineering Legacy Software and Docker in Action and have the authors on-line! See this thread and this one for details.
The backslash is special to both the Java compiler and the regexp parser, which means that to specify a real backslash in a regexp, you have to actually write four backslashes: Two of them (\\) are needed by the regexp, and then to get the Java compiler to parse those two, they have to be escaped, giving you four. So I believe your replacement expression ought to have five backslashes, total: "\\\\\"" .