[1785] in java-interest
Re: main() routine
daemon@ATHENA.MIT.EDU (Arthur van Hoff)
Sat Sep 16 23:44:01 1995
Date: Sat, 16 Sep 1995 11:47:43 -0800 (PDT)
From: Arthur van Hoff <Arthur.Vanhoff@Eng.Sun.COM>
Reply-To: Arthur van Hoff <Arthur.Vanhoff@Eng.Sun.COM>
To: Michael I Angerman <michael@santafe.edu>
Cc: java-interest@java.Eng.Sun.COM
Hi Michael,
> But the question still remains, where is main() called from.
Main is called when you invoke a class directly. For example:
java ArcTest
The java interpreter loads the ArcTest class and looks for a methods
called main with the following signature:
public static void main(String argv[]) {
...
}
If it finds one it calls it and passes it an array of command line
arguments. That is how you write the SayHello application for
example:
class SayHello {
public static void main(String argv[]) {
System.out.println("Hello " + argv[0]);
}
}
To invoke this you call:
java SayHello Michael
Have fun,
Arthur van Hoff
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