[27] in java-interest
Directly executing Java binaries
daemon@ATHENA.MIT.EDU (patl@asimov.lashley.slip.netcom.co)
Sun Apr 30 22:27:09 1995
From: patl@asimov.lashley.slip.netcom.com
Date: Sun, 30 Apr 1995 19:13:42 -0700
To: java-interest@java.Eng.Sun.COM
Unless I've missed something (quite possible), the only way to execute
a java program is to directly invoke the java interpreter, passing the
program filename as a parameter. (Or by running a shell script that
does that.)
This seems unnecessarily awkward; and I'd like to propose a simple
solution:
1. Modify the java interpreter so that if the .class file being
loaded starts with '#!', it will ignore everything up through
the first NEWLINE character. (I haven't checked the bytecodes,
but I am assuming that that is a very unlikely initial code
sequence...)
2. Modify the java compiler to put '#!java\n' at the beginning
of the output file, and to make the file executable, when
the class contains a 'static main' declaration.
I realize that this solution is probably very unix-centric. But the
other systems provide no similar functionality; so it shouldn't hurt
anything. (And I wouldn't be surprised if POSIX hasn't standardized
the '#!' technique...)
-Pat
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