// Self-reproducing Java program, by Mark Ashdown <http://www.mark.ashdown.name/>
public class SelfReproducing {
public static void main(String[] a) {
String s="System.out.print(\"public class SelfReproducing {"+
"public static void main(String[] a) {String s=\\\"\"+r(s)+\"\\\";\"+s);}"+
"static String r(String s){String q=\"\\\"\",b=\"\\\\\";return s.replaceAll(b+b,b+b+b+b).replaceAll(b+q,b+b+b+q);}}";
System.out.print("public class SelfReproducing {"+
"public static void main(String[] a) {String s=\""+r(s)+"\";"+s);}
static String r(String s){String q="\"",b="\\";return s.replaceAll(b+b,b+b+b+b).replaceAll(b+q,b+b+b+q);}}