Groups > comp.lang.java.programmer > #28324

verifying precedence

From	Roedy Green <see_website@mindprod.com.invalid>
Newsgroups	comp.lang.java.programmer
Subject	verifying precedence
Date	2014-05-01 04:50 -0700
Organization	Canadian Mind Products
Message-ID	<ivc4m95b309smq7g0pkes96cfpmdfsmj6q@4ax.com> (permalink)

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consider this line of code:

( Comparator<String> ) (Class.forName( comparatorName
).newInstance());

are the () around Class.forName( comparatorName ).newInstance()
necessary?

You could consult a precedence table, but you could misinterpret it.
Java's rules of precedence and association are quite complicated.

Is there a tool that will tell you:

1. which of your () are nugatory?

2. what your expression means were there no reliance on precedence,
handled purely with ()?

I think this would be a great tool for newbies.
-- 
Roedy Green Canadian Mind Products http://mindprod.com
Computers are like Old Testament gods; lots of rules and no mercy. 
~ Joseph Campbell (born: 1904-03-26 died: 1987-10-31 at age: 83)

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verifying precedence Roedy Green <see_website@mindprod.com.invalid> - 2014-05-01 04:50 -0700
  Re: verifying precedence leif.roar@invalid.com (Leif Roar Moldskred) - 2014-05-01 07:04 -0500
    Re: verifying precedence Joshua Cranmer 🐧 <Pidgeot18@verizon.invalid> - 2014-05-01 10:35 -0500
      Re: verifying precedence Joerg Meier <joergmmeier@arcor.de> - 2014-05-01 17:40 +0200
        Re: verifying precedence Joshua Cranmer 🐧 <Pidgeot18@verizon.invalid> - 2014-05-01 10:49 -0500
          Re: verifying precedence Joshua Cranmer 🐧 <Pidgeot18@verizon.invalid> - 2014-05-01 17:05 -0500
            Re: verifying precedence Gene Wirchenko <genew@telus.net> - 2014-05-02 10:22 -0700
            Re: verifying precedence "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2014-05-04 10:53 +0100
              Re: verifying precedence Simon Lewis <simonlewis2001@gmail.com> - 2014-05-04 13:23 +0200
          Re: verifying precedence Arne Vajhøj <arne@vajhoej.dk> - 2014-05-01 18:51 -0400
          Re: verifying precedence Arne Vajhøj <arne@vajhoej.dk> - 2014-05-01 19:00 -0400
          Re: verifying precedence Roedy Green <see_website@mindprod.com.invalid> - 2014-05-01 17:48 -0700
          Re: verifying precedence Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-05-02 13:29 -0400
      Re: verifying precedence Arne Vajhøj <arne@vajhoej.dk> - 2014-05-01 18:50 -0400
        Re: verifying precedence Arne Vajhøj <arne@vajhoej.dk> - 2014-05-01 19:18 -0400
    Re: verifying precedence Roedy Green <see_website@mindprod.com.invalid> - 2014-05-01 17:46 -0700
      Re: verifying precedence Arne Vajhøj <arne@vajhoej.dk> - 2014-05-01 21:27 -0400

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