Short Java Quine.

[Daniel Pitts]

Remove any line-breaks, and this becomes a quine.

enum Q {a("enum Q{a(%c%s%c);Q(String
t){System.out.printf(t,34,t,34);System.exit(0);}}");Q(String
t){System.out.printf(t,34,t,34);System.exit(0);}}


Just thought I'd share.

 

[Tony Winslow]

Remove any line-breaks, and this becomes a quine.

enum Q {a("enum Q{a(%c%s%c);Q(String
t){System.out.printf(t,34,t,34);System.exit(0);}}");Q(String
t){System.out.printf(t,34,t,34);System.exit(0);}}


Just thought I'd share.

Would you please be more specific?
I can't figure out what you mean!
Thank you!

 

[Daniel Pitts]

Would you please be more specific?
I can't figure out what you mean!
Thank you!

A quine is a program who's output is its own source code.

If you compile Q.java and then run java Q, it will output itself. All
this without reading from the original source file, mind you.

 

[Andrea Francia]

Remove any line-breaks, and this becomes a quine.

enum Q {a("enum Q{a(%c%s%c);Q(String
t){System.out.printf(t,34,t,34);System.exit(0);}}");Q(String
t){System.out.printf(t,34,t,34);System.exit(0);}}


Just thought I'd share.

I'm not able to get this Quine works. It lacks of the 'main' method.

 

[Wildemar Wildenburger]

I'm not able to get this Quine works. It lacks of the 'main' method.

Doesn't need one. Compiling it creates a Q.class file, wich can be run
by "java Q".

/W

 

[Lew]

A quine is a program who's output is its own source code.

More generally, a quine is a statement that quotes itself reflectively, as
thoroughly explained in Douglas Hofstadter's excellent book /Gödel, Escher, Bach/.
<http://en.wikipedia.org/wiki/Gödel,_Escher,_Bach>

I believe reading this book will raise one's IQ by ten points.

"Quine" in the software sense is explained in
<http://en.wikipedia.org/wiki/Quine_(computing)>

 

[Andrea Francia]

Doesn't need one. Compiling it creates a Q.class file, wich can be run
by "java Q".

It's a news for me, but it's true:
With

class A {
static {
System.out.println("Hello world!");
}
}

I obtain:

$ java A
Hello world!
Exception in thread "main" java.lang.NoSuchMethodError: main

And with

class B {
static {
System.out.println("Hello world!");
System.exit(0);
}
}

I obtain:

$ java B
Hello world!

Now is clear to me that the JVM before load the class and then try to
execute the 'main' method. And now this seems obvious.

 

[Tony Winslow]

More generally, a quine is a statement that quotes itself reflectively,
as thoroughly explained in Douglas Hofstadter's excellent book /Gödel,
Escher, Bach/.
<http://en.wikipedia.org/wiki/Gödel,_Escher,_Bach>

I believe reading this book will raise one's IQ by ten points.

"Quine" in the software sense is explained in
<http://en.wikipedia.org/wiki/Quine_(computing)>

As I'm in mainland China now, I can't visit wiki.
Do you know any solutions to this problem?

 

[Tony Winslow]

Remove any line-breaks, and this becomes a quine.

enum Q {a("enum Q{a(%c%s%c);Q(String
t){System.out.printf(t,34,t,34);System.exit(0);}}");Q(String
t){System.out.printf(t,34,t,34);System.exit(0);}}


Just thought I'd share.

It works!
Could you please explain the `enum' syntax to me briefly?
Thank you!

 

[Viks]

It works!
Could you please explain the `enum' syntax to me briefly?
Thank you!

Thank your for sharing the info....

-Vikas

 

[Christian]

As I'm in mainland China now, I can't visit wiki.
Do you know any solutions to this problem?

VPN tunnel to your own Server?
Run your own Proxy at home or get some proxy service?
SSH to your homepc and use lynx to look at wikipedia?

possibilities seem endless..

 

[Daniele Futtorovic]

As I'm in mainland China now, I can't visit wiki. Do you know any
solutions to this problem?

According to Wikipedia itself, you can bypass the firewall using Tor
(<http://www.torproject.org/>). It slows browsing, but for individual
sites this shouldn't be a problem. It's quite easy to install and to
operate. If you're using Firefox, you might want to install the
"Torbutton" add-on
(<https://addons.mozilla.org/en-US/firefox/addon/2275>), too.

df.