How to replace a plus character using Java's String.replaceAll method

Question

What\'s the correct regex for a plus character (+) as the first argument (i.e. the string to replace) to Java\'s replaceAll method in the String class? I can\'t

Answer 1

You need to escape the + for the regular expression, using \.

However, Java uses a String parameter to construct regular expressions, which uses \ for its own escape sequences. So you have to escape the \ itself:

"\\+"