/*

This might be known already. But I couldn't find in the
bug search.  If one use the word "Con" as a name for a
class, the JDK compiler produces the byte code, and
dumps to the screen, instead of creating a file
"Con.class".  Appearantly, it misinterprets the class
name as Console or something.

*/
class Con {
    public static void outputMessage() {
	System.out.println("java.version                  = " +
			   System.getProperty("java.version"));
	System.out.println("Operating System Name         = " +
			   System.getProperty("os.name"));
	System.out.println("Operating system architecture = " +
			   System.getProperty("os.arch"));
	System.out.println("Operating system version      = " +
			   System.getProperty("os.version") + "\n");
    }

    public static void main(String[] args) {
	outputMessage();
    }
}

(Review ID: 42799)
======================================================================
Posted Date : 2006-02-03 05:02:52.0

Don't use the word "Con".
======================================================================

I recall that there is special meaning for Con on win32 systems.  For Con.class as well?  I don't know.  Passing this on...

  xxxxx@xxxxx   1998-12-01

CON, LPT, NUL, and several others are reserved pathnames in win32.
Presumably, the compiler should know about these and escape them,
though I am unhappy with the idea that the compiler should know anything
about the platform it is running on -- it *should* be the canonical
100% pure Java program.  Again, this shows the need for a platform-independent
filesystem, or a means to query its capabilities in an abstract way.
See also 4307912.  Unlike the case with that bug, however, adopting a
"lowest common denominator" approach, always escaping these names on all
platforms, is not so unpalatable.

  xxxxx@xxxxx   2000-02-02
After bug 6176051 has been fixed in Mustang, the compiler should
now be able to handle this situation gracefully.
Posted Date : 2006-02-03 05:08:18.0

bug 6176051 has been fixed. Should check if the class file is a valid writable file before writing it, and fail gracefully if not.
Posted Date : 2006-12-08 03:32:22.0

See 6241975 for a list of bad possible names.
Posted Date : 2009-09-24 00:22:58.0