How to remove a carriage return from a string

carriage-return, java, regex

Solution

Java's `String.replaceAll` in fact takes a regular expression. You could remove all newlines with:

s = s.replaceAll("\\n", "");
s = s.replaceAll("\\r", "");

But this will remove all newlines.

Note the double `\`'s: so that the string that is passed to the regular expression parser is `\n`.

You can also do this, which is smarter:

s = s.replaceAll("\\s{2,}", " ");

This would remove all sequences of 2 or more whitespaces, replacing them with a single space. Since newlines are also whitespaces, it should do the trick for you.

Problem

Original source