How to validate the string object for alphabet input

Question

Hi,
I want to check for alphabet (a-z,A-Z), in String object. I need to check the object, whether its contain numerals or special character, in that case, I want to throw an error stating that "value is not valid". It should accept only the a-z or A-Z.
how to do this.
Thanks in advance
Karthi

Answer 1

> I want to check for alphabet (a-z,A-Z), in String
object. I need to check the object, whether its
contain numerals or special character, in that case,
I want to throw an error stating that "value is not
valid". It should accept only the a-z or A-Z.
how to do this.
As Rene suggested, you can do this using the Pattern class:
http://java.sun.com/j2se/1.4.2/docs/api/java/util/regex/Pattern.html
You can do it also by looping through your String and check with String's charAt(index) method (which returns a char) to see if every char from the String is >= A AND <= z.
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/String.html
Good luck.