Re: "call to super must be first statement in constructor"

From: Paul Chapman (paul_at_igblan.free-online.co.uk)
Date: 02/07/05 

Date: Mon, 7 Feb 2005 21:56:46 -0000

Mark,

> This sounds more like an interface than a subclass to me.

I'm starting to find out some weird things about Java -- well, they seem
weird to me. :)

One thing is that interface members must be public. This seems to me an
unnecessarily narrow use of interfaces. I started off using interfaces as a
way of "declaring" the methods that objects of other classes might want to
use. But that doesn't help define contracts between classes in the *same*
package.

The package seems to be too large a unit of subdomain development. Of
course, I come from Smalltalk, where everything is "public", so I shouldn't
worry.

Another thing was "protected", which I slowly discovered doesn't give any
"protection" within a package at all. Nor, for that matter, does "default"
access. What seems to be missing is C++'s idea of "protected", ie
accessible only within subclasses.

I am thinking about reorganizing my app into more, smaller packages, to
provide more compile-time protection from my own stupidity (and to increase
the extent to which contracts are self-documenting). But when I look at how
huge some of the standard API packages are, which have presumably been
written by expert Java programmers, I wonder if I'm missing something.

Cheers, Paul

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