IgnoreCase, how do i do it?

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ste1986 - 19 Nov 2005 22:21 GMT

I am having trouble getting my program to ignore how information is entered
(upper/lower case letters). i have been told i have to use IgnoreCase but i
cant get it to work.

below is the line of code where i need the IgnoreCase to ignore how
"desktop" is written (Desktop, desktop, dESktOP etc...)
if (type != "desktop")

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Andrew Thompson - 19 Nov 2005 23:44 GMT

> I am having trouble getting my program to ignore how information is entered
> (upper/lower case letters). i have been told i have to use IgnoreCase but i
[quoted text clipped - 3 lines]
> "desktop" is written (Desktop, desktop, dESktOP etc...)
> if (type != "desktop")

if ( !type.toLowerCase().equals("desktop") )

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Andrew Thompson
physci, javasaver, 1point1c, lensescapes - athompson.info/andrew
Currently accepting short and long term contracts - on Earth.

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Rhino - 20 Nov 2005 00:01 GMT

>> I am having trouble getting my program to ignore how information is
>> entered
[quoted text clipped - 7 lines]
>
> if ( !type.toLowerCase().equals("desktop") )

Or:

if (!type.equalsIgnoreCase().equals("desktop"))

The mistake you made in your original code is to use the = operator to
compare Strings. The correct technique for comparing Strings is to use the
methods in the String class.

Rhino

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Oliver Wong - 22 Nov 2005 17:31 GMT

>>> I am having trouble getting my program to ignore how information is
>>> entered
[quoted text clipped - 15 lines]
> compare Strings. The correct technique for comparing Strings is to use the
> methods in the String class.

Rhino is correct in saying that you should use methods like "equals" or
"equalsIgnoreCase" to compare strings, instead of the "==" or "!=" operator,
but his/her code has a small mistake (probably a typo). It should read:

if (!type.equalsIgnoreCase("desktop"))

- Oliver

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DrMatrix - 27 Nov 2005 19:05 GMT

> >>> I am having trouble getting my program to ignore how information is
> >>> entered
[quoted text clipped - 23 lines]
>
> - Oliver

Or better yet use:

if ( !"desktop".equalsIgnoreCase(type) )

This will work even if type == null. if
(!type.equalsIgnoreCase("desktop")) will get a NullPointerException when
type == null.

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Knute Johnson - 20 Nov 2005 03:44 GMT

>> I am having trouble getting my program to ignore how information is
>> entered
[quoted text clipped - 7 lines]
>
> if ( !type.toLowerCase().equals("desktop") )

if (!type.equalsIgnoreCase("desktop"))

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Knute Johnson
email s/nospam/knute/

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Roedy Green - 20 Nov 2005 02:18 GMT

>if (type != "desktop")

see http://mindprod.com/jgloss/gotchas.html#COMPARISON

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Canadian Mind Products, Roedy Green.
http://mindprod.com Java custom programming, consulting and coaching.

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IgnoreCase, how do i do it?

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