Groups > comp.lang.java.programmer > #36721

Re: How to handle same sanity checks

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From	Arne Vajhøj <arne@vajhoej.dk>
Newsgroups	comp.lang.java.programmer
Subject	Re: How to handle same sanity checks
Date	Sun, 25 Jun 2017 14:23:18 -0400
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On 6/25/2017 6:31 AM, Robert Klemme wrote:
> On 22.06.2017 11:10, Cecil Westerhof wrote:
>> In my code I have several methods that start with:
>>      if ((n < MIN_VAL) || (n > MAX_VAL)) {
>>          throw new InvalidParameterException(String.format(ERROR_N, n));
>>      }
>>
>> That is not really DRY.
> 
> A few minor remarks: brackets around comparisons are not needed.

Not necessary.

But actually recommended in the traditional Java coding convention.

<quote>
10.5.1 Parentheses

It is generally a good idea to use parentheses liberally in expressions 
involving mixed operators to avoid operator precedence problems. Even if 
the operator precedence seems clear to you, it might not be to 
others-you shouldn't assume that other programmers know precedence as 
well as you do.

     if (a == b && c == d)     // AVOID!
     if ((a == b) && (c == d)) // RIGHT

</quote>

Arne

Thread

How to handle same sanity checks Cecil Westerhof <Cecil@decebal.nl> - 2017-06-22 11:10 +0200
  Re: How to handle same sanity checks Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-22 10:27 +0000
    Re: How to handle same sanity checks Cecil Westerhof <Cecil@decebal.nl> - 2017-06-22 13:21 +0200
    Re: How to handle same sanity checks Cecil Westerhof <Cecil@decebal.nl> - 2017-06-23 06:51 +0200
    Re: How to handle same sanity checks Robert Klemme <shortcutter@googlemail.com> - 2017-06-24 12:06 +0200
      Re: How to handle same sanity checks Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-24 10:33 +0000
        Re: How to handle same sanity checks Robert Klemme <shortcutter@googlemail.com> - 2017-06-24 16:46 +0200
          Re: How to handle same sanity checks Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-24 19:37 +0000
  Re: How to handle same sanity checks Andreas Leitgeb <avl@logic.at> - 2017-06-22 11:26 +0000
    Re: How to handle same sanity checks Eric Sosman <esosman@comcast-dot-net.invalid> - 2017-06-22 07:44 -0400
      Re: How to handle same sanity checks Andreas Leitgeb <avl@logic.at> - 2017-06-22 12:30 +0000
  Re: How to handle same sanity checks Eric Sosman <esosman@comcast-dot-net.invalid> - 2017-06-22 07:40 -0400
    Re: How to handle same sanity checks v_borchert@despammed.com (Volker Borchert) - 2017-06-22 18:33 +0000
      Re: How to handle same sanity checks Cecil Westerhof <Cecil@decebal.nl> - 2017-06-23 06:48 +0200
        Re: How to handle same sanity checks Eric Sosman <esosman@comcast-dot-net.invalid> - 2017-06-23 09:57 -0400
          Re: How to handle same sanity checks Cecil Westerhof <Cecil@decebal.nl> - 2017-06-23 16:31 +0200
            Re: How to handle same sanity checks Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-23 17:21 +0000
              Re: How to handle same sanity checks Eric Douglas <e.d.programmer@gmail.com> - 2017-06-26 05:21 -0700
                Re: How to handle same sanity checks Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-26 13:34 +0000
                Re: How to handle same sanity checks Martin Gregorie <martin@address-in-sig.invalid> - 2017-06-26 15:22 +0000
        Re: How to handle same sanity checks Arne Vajhøj <arne@vajhoej.dk> - 2017-06-25 22:55 -0400
  Re: How to handle same sanity checks Marcel Mueller <news.5.maazl@spamgourmet.org> - 2017-06-22 23:07 +0200
  Re: How to handle same sanity checks Joerg Meier <joergmmeier@arcor.de> - 2017-06-25 09:52 +0200
  Re: How to handle same sanity checks Robert Klemme <shortcutter@googlemail.com> - 2017-06-25 12:31 +0200
    Re: How to handle same sanity checks Arne Vajhøj <arne@vajhoej.dk> - 2017-06-25 14:23 -0400
      Style police (Was: Re: How to handle same sanity checks) Eric Sosman <esosman@comcast-dot-net.invalid> - 2017-06-25 17:28 -0400
        Re: Style police (Was: Re: How to handle same sanity checks) Arne Vajhøj <arne@vajhoej.dk> - 2017-06-25 19:14 -0400
        Re: Style police (Was: Re: How to handle same sanity checks) Arne Vajhøj <arne@vajhoej.dk> - 2017-06-25 19:19 -0400
          Re: Style police (Was: Re: How to handle same sanity checks) Robert Klemme <shortcutter@googlemail.com> - 2017-06-26 23:34 +0200

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