Java
Версия с printf (c версии Java 5.0): (строка str разделена для читабельности)

package test;
public class Reproduce{
static String str = "package test;%2$1cpublic class Reproduce"
+ "{%2$1cstatic String str = %3$1c%1$1s%3$1c;%2$1cpublic static void main(String"
+ "[] args){System.out.printf(str, str,'%4$1cn','%3$1c','%4$1c%4$1c');}}";
public static void main(String[] args){System.out.printf(str, str,'\n','"','\');}}