Re: class TwoGen<T, V> means what?

From:

Lew <lew@lewscanon.com>

Newsgroups:

comp.lang.java.help

Date:

Tue, 17 Mar 2009 11:15:20 -0700 (PDT)

Message-ID:

<31b8a223-1cfb-4d70-ba78-d9f4dfc704ab@o36g2000yqh.googlegroups.com>

Mark Space wrote:

Why don't you try reading Sun's Java tutorial rather than relying on
cheesy websites?

<http://java.sun.com/docs/books/tutorial/java/generics/index.html>

Good recommendation. Among the signs of cheesiness in the other
website are:

class TwoGen<T, V> {

No comment as to why the class is package-private rather than public.

T ob1;
V ob2;

Meaningless, excessively brief field names, not declared private and
no comment offered to explain the package-private access. Use of 1-
based numbering in the variable names rather than 0-based, or better,
semantically rich names.

T getob1()

Once again, package-private access rather than public, without comment
as to why.

Disregard for the Java naming conventions.

int v = tgObj.getob1();

Given that 'getob1()' returns a 'T' type in a context that also has a
'V' type, naming its return 'v' is just plain confusing and rather
careless.

Auto-unboxing the 'Integer' without accounting for the possibility of
a 'null' value sets a bad example. It's also pedagogically weak,
introducing as it does another unrelated concept to the example
without explanation.

The OP would do well to take this web site's advice with a mine of
salt.

--
Lew