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From "Tony Wu" <wuyue...@gmail.com>
Subject Re: [classlib][kernel]A bug or non-bug difference?
Date Thu, 19 Oct 2006 10:06:08 GMT
Hi all,
  please note that the Throwable is a kernel class. It comes with VME.

On 10/19/06, Andrew Zhang <zhanghuangzhu@gmail.com> wrote:
> On 10/19/06, Tony Wu <wuyuehao@gmail.com> wrote:
> >
> > I've tried Log4j on Harmony and found there are many failures caused
> > by one difference between RI and Harmony. The
> > Throwable.printStackTrace(PrintWriter) calls the *println* method of
> > PrinterWriter on RI whereas calls *print* twice(Obviously print
> > msssage then print a line separator) on Harmony. It will cause
> > different behavior when a user inherit the PrinterWriter and override
> > these two methods. Shall we fix it or leave as an non-bug difference?
>
>
> For this case, RI doesn't conflict with spec, and is reasonable, so I think
> we'd better follow RI.  Additionally, log4j has shown its dependency of this
> feature!
>
> refer to testcase below,
> >
> > public class TestThrow {
> >    public static void main(String[] args) {
> >        MyWriter mw = new MyWriter(System.out);
> >        Throwable throwable = new Exception("Just Testing");
> >        throwable.printStackTrace(mw);
> >    }
> > }
> > class MyWriter extends PrintWriter {
> >    public MyWriter(OutputStream out) {
> >        super(out);
> >    }
> >
> >    public void print(String s) {
> >        System.out.println("print");
> >    }
> >
> >    public void println(String s) {
> >        System.out.println("println");
> >    }
> > }
> > OUTPUTS:
> > RI
> > println
> > HARMONY
> > print
> > print
> >
> > --
> > Tony Wu
> > China Software Development Lab, IBM
> >
> > ---------------------------------------------------------------------
> > Terms of use : http://incubator.apache.org/harmony/mailing.html
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> >
> >
>
>
> --
> Best regards,
> Andrew Zhang
>
>


-- 
Tony Wu
China Software Development Lab, IBM

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