How do I replace line break with "\n" with java? [duplicate]

Question

I want to replace newline with "\n" but my code isn't working.

str.replaceAll("\n","\n"));

Expected: "Hello\n World"

Actual:

"Hello

World"

Answer 1

If you want the backslash to show up you have to escape it. Otherwise it will be interpreted as a new line.

str = str.replaceAll("\n","\\\\n"));