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Old 08-09-2007, 11:12 AM
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lockmac is on a distinguished road
validating a string for numbers and letters?
Hi. I need to validate a string. My string is 7 characters long (which i have made validation for) but i need my string to validate so that the first 3 characters are letters and the next 4 characters are numbers..

any ideas how to do this? ive been told to use substring but i dont know how to use this to check if they are numbers or whether they are letters.

many thanks
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Old 08-09-2007, 11:17 AM
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vata2999 is on a distinguished road
I think you need Regular Expression but i don't know how use regular Expression in java See below link
[link]
Regular Expressions and the Java Programming Language
[/link]
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