Since the new line separator varies from platform to platform (e.g.
\n on Unix-like systems or
\r\n on Windows) it is often necessary to have a platform-independent way of accessing it. In Java it can be retrieved from a system property:
Because the new line separator is so commonly needed, from Java 7 on a shortcut method returning exactly the same result as the code above is available:
Note: Since it is very unlikely that the new line separator changes during the program's execution, it is a good idea to store it in in a static final variable instead of retrieving it from the system property every time it is needed.
%n rather than
\n or '\r\n' to output a platform independent new line separator.
System.out.println(String.format('line 1: %s.%nline 2: %s%n', lines,lines));