Re: Checking input for letters
Jerim79 wrote:
On Feb 21, 8:38 pm, "Andrew Thompson" <andrewtho...@gmail.com> wrote:
On Feb 22, 1:28 pm, "Jerim79" <m...@hotmail.com> wrote:
..
...Is there any other way
to do this, in the simplest way possibly?
For you, or the end user?
If for the 'end user', I would point out
that selecting on an item in a list to
perform a program option is easier than
'typing a numeric character representing
a program option'.
OTOH, if you mean for the programmer, then
the simplest possible way is probably not
the best way, once the application goes
beyond the completely trivial, or requires
changes.
Andrew T.
The data entered is a list of numbers which can be random, such as a
bank balance; way too many choices to present in a menu. It has to
accept input from the keyboard. Which of course allows the user to
type almost anything in.
If you don't present them in a menu, how do you propose to present them?
Whatever method you use could provide the user with the ability to select that
value from the list.
If you are insistent on taking input from the keyboard and validating it then
look at the Number class parse methods e.g. Integer.parseInt(),
Double.parseDouble() or use a JFormattedTextField and possibly a
MaskFormatter, see
<http://java.sun.com/docs/books/tutorial/uiswing/components/formattedtextfield.html>
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