Eight backslashes required to replace single backslash with double backslashes?

Question

This is a \"what the heck is going on here\" question. I don\'t actually need a solution.

I had to replace all single backslashes in a String with double backslashe

Answer 1

As a fan of not getting into super detailed explanations of regex... I figured out from the major answer post by Bart Kiers above:

System.out.println( "line1: "+"hello\\\\world" );
System.out.println( "line2: "+"hello\\\\world".replaceAll("\\\\\\\\", Matcher.quoteReplacement("\\") ) );

prints out

line1: hello\\world
line2: hello\world

I hope it helps...