How to remove a carriage return from a string

Question

String s ="SSR/DANGEROUS GOODS AS PER ATTACHED SHIPPERS
/DECLARATION 1 PACKAGE

NFY
/ACME CONSOLIDATORS"

How to strip the space between "PACKAGE" and "NFY" ?

Answer 1

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.