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i have a regex question!!!?
for java input validation
i need to only accept numbers and strictly one decimal point (dot).
if a decimal is entered, i only want to allow 2 decimal places following
any number of numbers before the decimal is fine
accepted:
123
123.45
.12
denied:
123.4
.123
123.
.
.1
thanks!
drspa44, since i have you here!
how about only numbers and up to 2 spots after the decimal and 2 before the decimal
decimal optional but if it is entered the above applies
accepted:
1
12
12.3
12.34
.1
.12
denied:
123
12.345
.
.123
2 Answers
- 7 years ago
First question:
\d*(\.\d\d)?
Second question:
\d{0,2}(\.\d\d?)?
or this (it does the same thing):
\d{0,2}(\.\d{1,2})?
Warning: All of these regexps will accept an empty string! And there's no easy way to fix that. So don't forget to check if the string is not empty before you try to match the regex.
