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Groups > comp.lang.java.programmer > #7700

Re: contains

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On 11-09-08 10:37 AM, Lew wrote:
> Arved Sandstrom wrote:
>> bob wrote:
>>> Is there any case-insensitive version of the String contains method?
>>>
>> Not that I'm aware of. An easy way to do the deed is to use Pattern;
>> something like
>>
>> boolean isContained  =
>>     Pattern.compile("isThisStringContained",
>>         Pattern.CASE_INSENSITIVE)
>>     .matcher("stringThatMayContainOther").find();
>>
>> does the trick.
>>
>> A possibly preferable alternative to doing case-insensitive string
>> operations is simply to uppercase (or lowercase) both Strings before
>> doing the operation. .toLowerCase() and .toUpperCase() are String
>> methods that are available for this purpose. If you plan to do this a
>> lot you can write up a small utility method.
> 
> Beware of uppercasing and lowercasing - the results can be surprising.
> 
> String whatThe = "ß".toUpperCase().toLowerCase();
> 
> What should be the value of '"ß".equalsIgnoreCase("ss")'?
> 
> What should be the value of '"ß".toUpperCase().toLowerCase().equals("ß")'?
> 
That's a good point, but it's no mystery that uppercasing/lowercasing
outside the standard 26-letter Latin alphabet has the odd pitfall here
and there, like Eszett rules.

So my second suggestion applies in particular to Strings that contain
Latin characters. For anything else you'd best be aware of the rules and
the nature of your text.

AHS

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contains bob <bob@coolgroups.com> - 2011-09-08 00:44 -0700
  Re: contains Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-09-08 08:19 -0300
    Re: contains Lew <lewbloch@gmail.com> - 2011-09-08 06:37 -0700
      Re: contains Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-09-08 11:33 -0300
        Re: contains Lew <lewbloch@gmail.com> - 2011-09-08 07:47 -0700
          Re: contains Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-09-08 18:59 +0000
            Re: contains Lew <lewbloch@gmail.com> - 2011-09-08 16:59 -0700
          Re: contains Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-09-08 16:37 -0300
            Re: contains supercalifragilisticexpialadiamaticonormalizeringelimatisticantations <supercalifragilisticexpialadiamaticonormalizeringelimatisticantations@averylongandannoyingdomainname.com> - 2011-09-08 20:14 -0400
  Re: contains Arne Vajhøj <arne@vajhoej.dk> - 2011-09-08 20:05 -0400

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