Validating a text field

[Ralph Carrasquillo Jr]

Hi I'm just starting out with java.... I was given a job which needs to validate
text fields.
The question is there a built in java function that handles this, checking
for alphanumeric, numeric, periods etc...

Any input is always greatly appreciated,
Ralph C.

[Paul Clapham]

No, Java methods tend to be more specifically focussed than that. So
there's no "validate" method because that encompasses a whole bag of
validations. But if you had specific functions in mind, such as "is that a
valid dollar amount" or "is that a valid date", then there are Java methods
for those things. Such as Integer.parseInt(String),
Float.parseFloat(String), DateFormat.parse(String). If you want to validate
other things such as credit card numbers, you won't find standard Java
methods for this but you may find that other people have written them
already. There's a lot of Java code available on the Internet if you look
for it.

PC2

Ralph Carrasquillo Jr <Ralph_Carrasquillo@NineWest.com> wrote in message
news:39f864b2$1@news.devx.com...
>
> Hi I'm just starting out with java.... I was given a job which needs to
validate
> text fields.
> The question is there a built in java function that handles this, checking
> for alphanumeric, numeric, periods etc...
>
> Any input is always greatly appreciated,
> Ralph C.