java-regular-expression

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How to remove all non-alphanumeric characters from a string in Java

Last Updated: 19 September 2022

Given string str, the task is to remove all non-alphanumeric characters from it and print the modified it.Examples:Input: @!Geeks-for'Geeks, ...read more

School Programming

ASCII

Java-String-Programs

Check if an URL is valid or not using Regular Expression

Last Updated: 07 December 2022

Given a URL as a character string str of size N.The task is to check if the given URL is valid or not.Examples :Input : str = "https://www.g ...read more

python-regex

How to validate GUID (Globally Unique Identifier) using Regular Expression

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Last Updated: 19 December 2022

Given string str, the task is to check whether the given string is a valid GUID (Globally Unique Identifier) or not by using Regular Express ...read more

regular-expression

How to validate a domain name using Regular Expression

Last Updated: 07 August 2024

Given string str, the task is to check whether the given string is a valid domain name or not by using Regular Expression.The valid domain n ...read more

regular-expression

How to check string is alphanumeric or not using Regular Expression

Last Updated: 03 January 2023

Given string str, the task is to check whether the string is alphanumeric or not by using Regular Expression.An alphanumeric string is a str ...read more

How to validate PAN Card number using Regular Expression

Last Updated: 26 December 2022

Given string str of alphanumeric characters, the task is to check whether the string is a valid PAN (Permanent Account Number) Card number o ...read more

How to validate a Password using Regular Expressions in Java

Last Updated: 31 January 2023

Given a password, the task is to validate the password with the help of Regular Expression. A password is considered valid if all the follow ...read more

How to validate an IP address using Regular Expressions in Java

Last Updated: 10 June 2021

Given an IP address, the task is to validate this IP address with the help of Regular Expressions.The IP address is a string in the form "A. ...read more

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Computer Networks

Check if a String Contains only Alphabets in Java using Regex

Technical Scripter 2019

Last Updated: 05 April 2022

Regular Expressions or Regex is an API for defining String patterns that can be used for searching, manipulating, and editing a text. It is ...read more

Java-Strings

Program to check valid mobile number

Java-String-Programs

Last Updated: 19 April 2023

Mobile Number validation criteria:The first digit should contain numbers between 6 to 9.The rest 9 digit can contain any number between 0 to ...read more

Java-Strings

Check if Email Address is Valid or not in Java

Java-String-Programs

Last Updated: 28 November 2024

Validating email addresses means they meet the correct format by avoiding invalid inputs. To Validate email addresses in Java, we can use Re ...read more

String matches() Method in Java with Examples

Last Updated: 20 November 2024

In Java, the matches() method in the String class checks if a string matches a specified regular expression. It is useful for validating inp ...read more

Java-Strings

Java-Functions

Program to remove vowels from a String

Last Updated: 16 February 2023

Given a string, remove the vowels from the string and print the string without vowels.Examples:Input : welcome to geeksforgeeksOutput : wlcm ...read more

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vowel-consonant

Regular Expressions in Java

Basic Coding Problems

Last Updated: 06 November 2024

In Java, Regular Expressions or Regex (in short) in Java is an API for defining String patterns that can be used for searching, manipulating...read more

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