Hi,
I am new to Java Regex, i have a requirement in which i need to write java regex for validating ip address keeping in mind the below points.
Basically i need to validate the search key word, which a user enters.
1) IP-address notation dictates that is consists of 4 “dotted-decimals” – i.e. 4 “digit strings” that are separated by a “.” (dot).
Each dotted-decimal is between 1-3 digits long and value of a dotted-decimal number must be between 0-255 to be valid.
Example of valid IP-address notation: 0.0.0.0 or 1.2.3.4 or 23.34.45.56 or 255.255.255.255 (>256 is not valid)
2) Example of allowed inputs:
a) dotted-decimal: .1 or 1. (note: could be with or without leading/trailing “.” !)
b) dotted-decimals: 1.2 or .2.3 or .2.3. or .3.4 (note: could be with or without leading/trailing “.” !)
c) dotted-decimals: 1.2.3 or 1.2.3. or .2.3.4 (note: could be with or without leading/trailing “.” !)
d) dotted-decimals: 1.2.3.4 (note: could be with or without leading/trailing “.” !)
Need Regex pattern for the above.
Thanks in Advance.
Regards,
Girish
