Java code for validating ip address

The format of an IP address is a 32-bit numeric address written as four decimal numbers (called octets) separated by periods; each number can be written as 0 to 255 (e.g., 0.0.0.0 to 255.255.255.255). I want to do the same thing, but pass a String in the format: [0-255].[0-255].[0-255].[0-255] and have it tell me if the address is within a legal range...

The format of an IP address is a 32-bit numeric address written as four decimal numbers (called octets) separated by periods; each number can be written as 0 to 255 (e.g., 0.0.0.0 to 255.255.255.255).

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In the book must be used not mathematical "minus" symbol, but simply dash symbol, which is special character probably converted into it by one of the posh text editors such as "MS Word" or "Open Office". To avoid such a things, copy text first to a raw text format (I presume that you use one of those OS, so you can use the best known editors NOTEPAD for windows, Text Wrangler for Mac's) As you can see, I actually use the code to monitor two different Text Fields, one is when the user types in the IP address and the other is when they type in the port number (relevant for a database connection in my case).By S G Ganesh) for validating an IP address but it fails to validate a valid IP addresses.I found another example on the internet(**) and it works super fine, no problem at all.The host name can either be a machine name, such as "com", or a textual representation of its IP address.If a literal IP address is supplied, only the validity of the address format is checked. The get By Name() function will take IP Addresses or DNS names. According to Wikipedia, IPv4 addresses are canonically represented in dot-decimal notation, which consists of four decimal numbers, each ranging from 0 to 255, separated by dots, e.g., 1.1 step 2) ……..a) If ptr contains any character which is not digit then return 0 ……..b) Convert “ptr” to decimal number say ‘NUM’ ……..c) If NUM is not in range of 0-255 return 0 ……..d) If NUM is in range of 0-255 and ptr is non-NULL increment “dot_counter” by 1 ……..e) if ptr is NULL goto step 3 else goto step 1 step 3) if dot_counter ! programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums Hi every one I am trying to implement an example (Book* : Java SE 7 ..The explanation is that a static method cannot be overriden.I know this must be confusing as your previous example compiles, but you're just hiding the method.Thanking you all in advance Out Put: false 35 35 253.205.188.123 is valid? false *: Oracle Certified Professional Java SE 7 Programmer Exams 1Z0-804 and 1Z0-805 ... // This program demonstrates how we can validate an IP address @fred rosenberger, Super man , wonderful.. I changed the dash sign with minus and now it works fantastic. Then I threw it at a Rex Ex pattern, and if it matched, I then tested each octet simultaneously in one custom procedure: Yes you are very right.I still wonder how they did it in the book, because on my keyboard i have only two dash signs, I tried the code with both signs and it works perfectly.