How to output the code itself?

Question

How many ways are there to let the code output itself?

For example, write the code below,

public class Test
{
   public static void main(String[] args)
   {
      // some code
   }
}

to output itself

public class Test
{
   public static void main(String[] args)
   {
      // some code
   }
}

(Any programming language is accepted)

EDIT This question has been answered in the historical posts, search "quine" or check out http://stackoverflow.com/search?q=quine

Answer 1

look up Quines.

Answer 2

This is called a programming quine, and has been extensively discussed on SO:

http://stackoverflow.com/search?q=quine

Also see

http://en.wikipedia.org/wiki/Quine_(computing)

http://www.nyx.net/~gthompso/quine.htm

http://www.madore.org/~david/computers/quine.html

Answer 3

You are wanting to read about quines. See here.

Answer 4

http://en.wikipedia.org/wiki/Quine_(computing)

http://www.nyx.net/~gthompso/quine.htm

Answer 5

http://en.wikipedia.org/wiki/Quine_(computing)

Answer 6

Hasn't this question already been asked?

Answer 7

There are an infinite number ways to do this. All you have to do is find one way and then add comments....