Re: A Boolean inside a subclass of a subclass of Thread is null when accessed from run().

["Kjetil S. Matheussen" <k dot s dot matheussen at notam02 dot no>]

On Thu, 25 Jan 2007, Per Bothner wrote:

> Kjetil S. Matheussen wrote:
>
> Your test program works for me.
>
> >  The weird thing about this is that the variable "isplaying" is a Boolean
> >  initialized to false in the class AThread:
> >  "private Boolean isplaying=true;"
>
> Note you typed Boolean rather than boolean, so it's actually
> implemented as:
>  private Boolean isplaying=Boolean.valueOf(true);

Thanks! Changing to boolean fixed it. I didn't know about boolean. But I 
wonder something fishy may be going on anyway? If running kawa 
interactively, the error dissappears after evaluating (<AThread>) enough 
times.

I also tried various java implementations (its very easy to switch 
between java implementation when using gentoo), and:

2)      IBM JDK 1.5.0.3 [ibm-jdk-bin-1.5]
3)      WebLogic JRockit 1.5.0.06 [jrockit-jdk-bin-1.5]
4)      Sun JDK 1.5.0.10 [sun-jdk-1.5]
5)      Sun JDK 1.6.0 [sun-jdk-1.6]

All shows the same result (isplaying==null), while:

1)      Blackdown JDK 1.4.2.03 [blackdown-jdk-1.4.2]

didn't compile and gave error about the Boolean/boolean mixup.