Phone number validation in java.
Utility for international phone numbers.
Phone number validation in java ), parentheses (). I have tested formats including 1234567890, … Jul 23, 2025 · Phone validation is useful for users to check whether the number entered by the user is a valid number or not. Nov 21, 2019 · You can match a valid mobile number using the following regular expression − "\d{10}" A valid mobile number generally have 10 digits (in India). The mobile number can have 11 digits also by including 0 at the starting. phonenumbers. How to validate a phone number using regular expressions (regex) in Java: Nov 23, 2021 · In this short article, we'll take a look at how to validate a phone number in Java, using the regex package and multiple Regular Expressions. Jan 31, 2023 · Validating Nigerian Phone Numbers Now that you have imported the library, let’s use it to validate Nigerian phone numbers. I want to make sure the user enters a valid phone number using regex. Comprehensive guide with examples and best practices for developers. The quantifier ex {n} suggests the repetition of ex n times. So I was thi Aug 9, 2024 · Phone number validation in Java is an essential task that can enhance user experience and data integrity. In this tutorial, we validate some of the formats of phone number. Validating phone numbers using regex in JavaScript There are Jan 27, 2009 · Regular expression pattern in Java always is the best method to validate an user’s phone number. Scanner; import java. Jul 23, 2025 · In Java, validating mobile numbers is usually done by using Regular Expressions (Regex) that define patterns for matching strings. Libphonenumber is a powerful library — it is a Swiss army knife. util. Mobile number validation can be implemented for both local (Indian) and global phone numbers. How do I check if a phone number is valid or not? It is up to length 13 (including character + in front). Use a specialized library. The mobile number can be of 12 digits also by including 91 at the starting The number which satisfies the above criteria is a valid mobile Number. So, I can use this library to validate the phone numbers of any country. Apr 17, 2024 · While regex (regular expression) is not the only tool you have to validate phone numbers, it gives you valuable insights into the legitimacy of the data you are ingesting at the onset. So, we have to use some open source libraries to perform such validation. Jun 16, 2025 · extends java. This guide covers simple regex, NANP validation, and international numbers. By utilizing regex for simple formats, and advanced libraries for international formats, you can create robust validation mechanisms. Discover the practical implementation of regular expressions to ensure accurate and reliable phone number validation. It is difficult to validate mobile numbers for each country. Aug 7, 2025 · Vietnamese phone number Regex validation. So, in this section, we will learn how to validate mobile numbers in Java using regular expression and Google's libphonenumber API. Consider you entered the mobile number Jul 23, 2025 · Checking stored Phone Numbers in a list to a specific pattern using Regular Expression help in flexible and scalable for validating or extracting specific formats of data we use regular expression pattern. lang. The problem is that by only using @NotBlank on the phoneNumber field the app doesn’t actually make sure that the phone number is even a number, never mind a valid phone number. Alphanumeric characters are all alphabets and numbers i. java libphonenumber requires locale for validation so we need to create a custom class for storing phone and regioncode Jun 11, 2021 · I n this tutorial, we are going to see how to validate a phone number using regular expressions (regex) and the Pattern. That sounds interesting. The metacharacter " \d " matches the digits from 0 to 9. 0 (Ice Cream Sandwich). compile (regex) method to compile the regular expressions in Java. Ensure your phone number validation is accurate and with regex. I want to check for length and alphanumeric character. If you have any doubts related to the Java phone number format, just do leave a comment here. Here is my problem: Create a constructor for a telephone number given a string in the form xxx-xxx-xxxx or xxx-xxxx for a local number. Here i provide a regex pattern to determines if the phone number is in correct format, the pattern force starting with 3 digits follow by a “-” and 7 digits at the end. You can prepare a pattern that matches the desired format of phone number as per your requirement. Jan 28, 2018 · I am writing a program using java swing in a form to validate the user's input. Throw an exception if the format is not valid. It helps validate input data by checking if it matches a defined structure. Object implements java. import Apr 24, 2020 · Interested to learn about Validate Phone Numbers? Check our article presenting a guide on how to validate phone numbers in java for different countries. It is written in C++ and Java, and, while it has an official autogenerated javascript port, that port is tightly coupled to Google's closure javascript framework, and, when compiled into a bundle, weighs about 550 kB (350 kB code + 200 kB metadata). letters A–Z, a–z, and digits 0–9. Pattern. the length of phone numbers may vary from 7 digits to 15 digits. Incoming call is the number from which the call is coming and the other numbers are the Sep 1, 2023 · Phone number validation is a critical aspect of web application development. To validate phone number in Java, the easiest way is to use a regular expression and apply string matching using String. The following java program has written in multiple ways along with detailed algorithmic explanation with sample outputs. The rules and conventions used to print international phone numbers vary significantly around the world, so it’s hard to provide meaningful validation for an international phone number unless … In this tutorial, we will dive into Java Libphonenumber, a powerful library developed by Google for parsing, formatting, and validating international phone numbers. From understanding the importance of this question to best practices for phone number validation, this article covers it all. 7890, 123 456 7890, (123) 456 7890, and all related combinations. Examples: Input : Enter Utility for international phone numbers. Most important things to know about Phone number regex and examples of validation and extraction of Phone number from a given string in Java programming language. Also discussed a phone number structure, example of valid phone number. For better validation, it’s possible to create a custom annotation Jun 1, 2017 · I can only accept 7 or 10 digit phone numbers, but characters such as (,), (-), etc are acceptable. Via a maven project, let us do the same. I need to match that number with a model number. The phone number should start with a plus sign followed by a minimum of 1 nu Dec 27, 2023 · Luckily, JavaScript provides excellent built-in tools for validation if you know how to use them properly. Serializable, java. May 28, 2024 · In this regex tutorial, we will learn to validate international phone numbers based on industry-standard notation specified by ITU-T E. How do I do that? I tried this: String regexStr = "^[0-9]$"; String number=entered_number. Feb 23, 2012 · I am using the following code to validate a phone number. In this article, we are going to discuss how to implement the phone number validator in Android step by step. It may contain white spaces or a hyphen ( - ). Matcher; import java. Mar 7, 2017 · Learn how to validate phone numbers using JavaScript and regular expressions with examples and expert insights on Stack Overflow. Finally, I get the feeling you're validating user input in a web browser. I have done Learn how to validate phone numbers in Java using regular expressions, including code examples and common mistakes. With many websites . PhoneNumberUtil import com. Google's libphonenumber provides a powerful API for parsing, formatting, and validating phone numbers across different countries. If this box is empty or the phone number isn't in the correct format (not 7 or 10 numbers long, not a number) or has been left blank, I have to add a red border around the text box. In this comprehensive guide, we’ll explore methods for validating phone numbers using JavaScript regex patterns. Google's libphonenumber is an ultimate phone number formatting and parsing library developed by Google for Android phones. We will focus mostly on validating phone numbers with this library. 2 days ago · Explore the functionality offered by libphonenumber to format and validate phone numbers using code samples. Example 1 import java. Jan 27, 2018 · I'm creating a form in java swing and I need to verify that the user has indeed entered phone number and not "abcde". i18n. This method matches the regular expression for the phone number and the given input phone number and returns true if they match and false otherwise. We'll walk through four distinct methods for validation, providing code for each. Why Phone Number Validation Matters Let‘s first discuss why properly validating numbers is so important for both security and the user experience. No validation is performed because phone numbers have many different formats - local, long distance, domestic, international, internal extension, TTY, VOIP, SMS, and alternative networks like Skype, XFire and Roger Wilco. S. Feb 1, 2023 · What is libphonenumber? Libphonenumber is Google’s library for parsing, formatting, and validating international phone numbers in Java, C++, and JavaScript. Aug 19, 2022 · Javascript function to validate a phone number. Aug 13, 2025 · The following Java implementation validates a U. To learn more about Regex visit this:- Regex Tutorial For phone number validation, we'll use Regex to define patterns that match the common formats of phone How to validate email, SSN, phone number in Java using Regular expressions. The phone number can be validated using the java. Functionality includes formatting, parsing and validation. matches() method. May 27, 2020 · Java Regex Pattern to Validate Phone number with Whitespace, Hyphen, No Space, Parenthesis, Country Code, and Different Country based Phone number format. The easiest way to validate phone numbers using Javascript would be to use Regular expressions. Do I put the code in the Jbutton area or the text field area? I'm looking to Apr 5, 2025 · Introduction Phone number validation is a crucial part of many applications, especially those involving user authentication, contact management, and messaging services. I figured everything out but the Java Regular Expression code o Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers. Read on to learn the simplest method to validate phone numbers in JavaScript using Regular Expressions. In this article, you will learn how to use regex to match standard 10-digit phone numbers. In this article, let us see how to validate phone numbers with and without country codes and test the same via JUNIT to check whether the given testing phone numbers are correct or not. Phonenumber Create an instance of the PhoneNumberUtil class. Understanding and correctly using phone number validation can significantly improve user Jul 23, 2025 · Validating phone numbers is a common prerequisite in today’s web, mobile, or desktop applications, but Java does not have an integrated method for carrying out this kind of common validation. The Java version is optimized for running on smartphones, and is used by the Android framework since 4. Regular Expressions offer a concise and powerful search-and-replace mechanism. Learn how to validate phone numbers in Java using regex. The rest 9 digit can contain any number between 0 to 9. Pattern; public class PhoneNumberExample Apr 3, 2014 · I have a phone number that can appear in different formats. Import the following in your java/android class import com. Learn how to effectively validate 10-digit phone numbers in web forms using JavaScript and HTML with our comprehensive tutorial on JavaScript Phone Number Validation. Validate phone numbers in JavaScript using regular expressions and the libphonenumber-js library. Jan 8, 2024 · Sometimes, we need to validate text to ensure that its content complies with some format. Jul 23, 2025 · Any web/mobile/console application should be error-free and hence it has to undergo a lot of validations. Example Project Project Structure: Maven project and hence Apr 19, 2023 · Mobile Number validation criteria: The first digit should contain numbers between 6 to 9. 456. Remember that client-side validation is only a convenience you provide to the user; you still need to validate all input (again) on the server. virtualNumber is Jul 23, 2025 · Given some Phone Numbers, the task is to check if they are valid or not using regular expressions. However there are different formats of Phone numbers depending on the user’s preference. Rules for the valid phone numbers are: The numbers should start with a plus sign ( + ) It should be followed by Country code and National number. This library is widely used in applications to ensure that phone numbers are processed correctly and in accordance with global formats. They are patterns of characters used to perform a search, extract or replace operations on the given text. In this comprehensive guide, you‘ll learn: Regex basics for matching string patterns Simple regexes to validate basic phone number formats More robust regexes to handle […] May 25, 2024 · Regex for North American Phone Number Validation In this regex tutorial, we will learn to validate user-entered phone numbers for a specific format (in this example phone numbers are formatted in North American format) and if the numbers are correct then reformat them to a standard format for display. A general observation is that all countries phone number falls somewhere between 8 to 11 digits after excluding country code. Learn how to validate phone numbers in Java with this comprehensive guide, including examples and common mistakes to avoid. Regular expressions can also be used to validate that the input conforms to a given Nov 11, 2024 · Can @Pattern be used for validating email or phone numbers? Yes, it can enforce formats like email and phone numbers using appropriate regular expressions. Regular Expression Phone Number validation Validating a phone number using regular expression is tricky because the phone number can be written in many formats and can have extensions also. In this article, we’ll explain how to validate phone numbers straightforwardly using JavaScript and HTML. The code must be done using a try/catch block, Mar 28, 2022 · how to validate virtual number/phone number in java? Virtual number can be 12 characters long and format should be 90507167819. GitHub Gist: instantly share code, notes, and snippets. May 24, 2025 · Java programming exercises and solution: Write a Java program to validate a phone number. In the following code I am trying to get the output to be the different formatting of phone numbers and if it is either valid or not. matches () method. Jan 11, 2021 · In this post, we will see how to validate phone number in java. These formats include 1234567890, 123-456-7890, 123. Aug 6, 2016 · I am trying to validate phone numbers in java. io. One such library is Google’s phone number library. //Java Jul 10, 2020 · 2. 123. The requirements are the phone number should be inbetween 10-25 characters length, should include hypen(-),period(. Java Alphanumeric Regex Example This Java example demonstrates how to write a regular expression to validate user input in such a way that it allows only alphanumeric characters. May 17, 2012 · For those who are looking for a custom validator for phone numbers using libphonenumber PhoneNumber. If the user has entered the number is not valid then it will show a Toast message to re-enter the number. In this blog, we'll explore how to create a custom annotation for phone validation in Java Feb 9, 2010 · Validate and Format North American Phone Numbers Problem You want to determine whether a user entered a North American phone number in a common format, including the local area code. Jul 23, 2025 · Using Regular Expressions for Validation Regex is a pattern-matching syntax used to find specific patterns in text, such as phone numbers, emails, or passwords. Using regular expressions (regex) provides a flexible way to check if user-provided phone numbers match expected formatting patterns. TL;DR don't use a regular expression to validate complex real-world data like phone numbers or URLs. According to a 2021 This Java regex example demonstrates how to use regular expressions to validate phone numbers in Java with an example. Sep 11, 2023 · Are you excited to explore phone number validation in JavaScript? Ensuring phone numbers is important in every aspect. or Canadian phone number and includes a main method to demonstrate how to check both valid and invalid numbers: Phone number validation is a fundamental step for ensuring data integrity in Java applications. Comparable<PhoneNumber> A human-readable phone number. In this quick tutorial, we’ll see how to validate different formats of phone numbers using regular expressions. In my country, phone numbers either begin with 9 or 8 and only have 8 numbers. regex. google. Examples: Input:+91 (976) 006-4000 Apr 6, 2020 · These annotations are part of the Bean Validation framework that Spring uses when creating a Person object from the fields in the form. If the phone number is valid, you want to convert it to your standard format, (123) 456 I need to validate the beginning of a phone number, by this I mean I need to make sure that a country code was provided. Nov 12, 2023 · Validating phone number input is a common need for many web applications. Most of the countries have 10 digits phone number after excluding country code. You Oct 13, 2025 · Java program to validate the phone number format in a perfect order with dashes. e. hjbmwrdvxtjbekjkamyfvdmjjkfrbdbcnbmwcfnqguybofjdrsccwflzvbelltssq