C # – Java literals in raw string

I saw that in jdk 12, it is possible to create raw string literals similar to some programming languages ​​such as C #, JS, R, and so on.

Ex: C #

                "This is not a  n raw string";

Exit: This is not a

raw string

                @ "This is a  n raw string";

Output: This is a raw string n

My question is: how to use this feature in jdk 12?