[1777] in java-interest
Re: A few queries...
daemon@ATHENA.MIT.EDU (Jonathan Payne)
Sat Sep 16 22:38:57 1995
Date: Fri, 15 Sep 1995 13:29:26 -0700
From: jpayne@starwave.com (Jonathan Payne)
To: aw@bae.bellcore.com
Cc: java-interest@java.sun.com
In-Reply-To: <9509151900.AA17921@jello> (message from Andrew Wason on Fri, 15 Sep 95 15:00:27 -0400)
All objects are pointers, and the pointer values are passed by value.
> Date: Fri, 15 Sep 95 15:00:27 -0400
> From: Andrew Wason <aw@bae.bellcore.com>
> Sender: owner-java-interest@java.sun.com
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>
> Llew Mason <mason_l@ee.uwa.edu.au> writes:
> >
> > As far as I could tell this wasn't discussed in any of the provided =
> > documention. Java currently passes class arguments by non-const =
> > reference.
>
> It looks like method arguments are passed by value.
>
> The following prints:
>
> o=java/lang/Object[]i=10
> o=java/lang/Object[]i=10
>
> If the arguments were passed by reference, the locals in main()
> would have been modified by the call to foo.
>
> class Ref {
> static void foo(int i, Object o) {
> i = 7;
> o = new Object();
> }
> public static void main(String argv[]) {
> int i = 10;
> Object o = new Object();
> System.out.println("o=" + o + "i=" + i);
> foo(i, o);
> System.out.println("o=" + o + "i=" + i);
> }
> }
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