Regular expression in java for validating numbers

If you want to use regular expression for validating phone or mobile numbers followed by country code.

Regular expressions are a right way to validate text fields such as phone numbers, names, addresses, age, date and other input information.

This java Script code determine whether a user entered phone number in a common format that includes 0999999999, 099-999-999, (099)-999-9999, (099)9999999, 0, 099 999-9999, (099) 999-9999, 099.999.9999 and all related combinations For this we use this regular expression: /^\(?

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For instance, a string of 1s would pass the validation but is not a phone number in the UK.

Listing A provides Java Script code that will validate the number.

The second main use of regular expressions is for search and replace operations.

If you are running a chat group where users can enter data, for example, you might want to check the input for swear words and replace them with blanks.To avoid such vulnerability, you should validate text fields (such as names, addresses, tax identification numbers, and so on) and use regular expressions to do the following: Regular expression support is available to ASP. If you capture input by using server controls, you can use the Regular Expression Validator control to validate that input.NET applications through the Regular Expression Validator control and the Regex class in the System. You can use regular expressions to restrict the range of valid characters, to strip unwanted characters, and to perform length and format checks.These patterns are used with the exec and test methods.In this article we will discuss about regular expression for validating Phone number in various format.For example, suppose you wanted to capture a user's UK phone number—which is a five-digit area code and then a six-digit phone number.

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