Java string replacing (remove newlines, change $ to \$)

Question

I have a string like that ($ character is always surrounded with other characters):

a$b
c$d
e$f

I want my string method to put a \ in front of $ and remove newlines:

a\$bc\$de\$f

I tried this but it doesn't put \ character:

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

Answer 1

Use replace() method instead of replaceAll(). As Michelle correctly notes, replaceAll() uses regular expressions, that cause problems with $ character, while replace() is literal, which is quite sufficient for your case.

Answer 2

$ is a reserved character in java Patterns, it indicates the end of line or end of input.

You also need to escape the replacement... thrice.

Try replaceAll("\\$", "\\\\\\$")