In text field we need to restrict field input using masking , i.e field should

^ symbol is use for checking start of the pattern e.g in my case string must start with number bet 0-9 so i have used ^[0-9]
$ symbol used to check end of the pattern. e.g in my case it is 0 or more occurrence of comma followed by number so i have used (,[0-9])*$ .
Link for reference :
www.regular-expressions.info/reference.html

^ symbol is use for checking start of the pattern e.g in my case string must start with number bet 0-9 so i have used ^[0-9]
$ symbol used to check end of the pattern. e.g in my case it is 0 or more occurrence of comma followed by number so i have used (,[0-9])*$ .
Link for reference :
www.regular-expressions.info/reference.html