[1766] in java-interest
Re: A few queries...
daemon@ATHENA.MIT.EDU (Michael Lorton)
Sat Sep 16 20:28:42 1995
Date: Fri, 15 Sep 1995 10:48:54 -0700
From: Michael Lorton <mlorton@eshop.com>
To: mason_l@ee.uwa.edu.au
Cc: java-interest@java.sun.com
In-Reply-To: <01BA83B3.200B3520@s158.dialup.uwa.edu.au> (message from Llew Mason on Fri, 15 Sep 1995 21:35:04 +-800)
> I've been evaluating Java for the past few days and have a few queries =
> on the language. (keep in mind that I have been using the NT 1.0a3 =
> release and haven't seen the development kit) Please correct me if =
> anything I have stated below is incorrect.
>
> 1) Pass-by-value vs pass-by-reference vs pass-by-const-reference
>
Yeah, constancy was a curious omission from the language.
> 2) Meta-classes (template classes for those unfortunate C++ people)
>
> There seems to be no way to implement meta-classes within Java. The =
> interface mechanism allows for class methods to operate on any class =
> which implements a particular interface, but cannot guarantee the =
> homogeneity of instantiated classes. This makes usage of classes like =
> Vector unsafe (not to mention inelegant) since all elements need to be =
> typecast to the required type upon extraction.
extend Vector and create a class that takes an object of class Class
as a argument to the constructor and uses that Class to test every
insertion. This solves the type-safety problem (or at least moves the
exception to earlier in the run-time). You could "manually" template
the Vector class to do the overloading for you, but yes, inelegant.
> 3) Operator overloading
Jeez, please don't start that one again. Let us just say that a
majority seems to agree with the decision as made.
> 4) AWT class package DisplayItem class
Seems to be changed in Beta.
> see no reason why Java couldn't become as popular as C++.
Me neither.
> Llew Mason
M.
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