java code on as a output

[naveen yadav]

hi ranchers,


Is that possible to write a java source program that print itself as output ??

[fred rosenberger]

yes

[Keith Rainey]

Read this thread: here

[naveen yadav]

hi fred rosenberger ,

i follow your link but the following store itself in string array and then print itself through in loop.this i was looking for some robust method.

public class Quine
{
  public static void main( String[] args )
  {
    char q = 34;      // Quotation mark character
    String[] l = {    // Array of source code
    "public class Quine",
    "{",
    "  public static void main( String[] args )",
    "  {",
    "    char q = 34;      // Quotation mark character",
    "    String[] l = {    // Array of source code",
    "    ",
    "    };",
    "    for( int i = 0; i < 6; i++ )           // Print opening code",
    "        System.out.println( l[i] );",
    "    for( int i = 0; i < l.length; i++ )    // Print string array",
    "        System.out.println( l[6] + q + l[i] + q + ',' );",
    "    for( int i = 7; i < l.length; i++ )    // Print this code",
    "        System.out.println( l[i] );",
    "  }",
    "}",
    };
    for( int i = 0; i < 6; i++ )           // Print opening code
        System.out.println( l[i] );
    for( int i = 0; i < l.length; i++ )    // Print string array
        System.out.println( l[6] + q + l[i] + q + ',' );
    for( int i = 7; i < l.length; i++ )    // Print this code
        System.out.println( l[i] );
  }
}

by the way thanks .

[fred rosenberger]

it doesn't quite store itself, as that would be infinitely recursive - it stores a sub-set of itself.

What do you mean by a 'robust method'? What are you actually trying do do? It would be much easier if you told us what you really want, rather than ask a vague question and then tell me my answer isn't what you were looking for.

[naveen yadav]

what i want is write a simple java program and using Java API or some other way (Robust way) to print the program code itself.
note that in the program should print itself i without any duplication code. as it was in above example.

[Saifuddin Merchant]

Have a look at the link Keith Rainey has posted - it gives you hints how to do that!

[Saifuddin Merchant]

and here a link which writes Quine in all possible languages,

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

There are about 4 or 5 real java solutions too!

[naveen yadav]

hi Sam Mercs,

i follow your link nothing new was there were same examples which uses string array and duplicate the source code

Although the link provided by Keith Rainey is good in-comparison