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java-regular-expression

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How to Check Whether the Date is in the Proper Format Using Regex?

Last Updated: 23 July 2025

Regex is a very interesting way to search, test, and match for patterns in a String that the user provides. Regex stands for Regular Expressions. Using regex is in applica...read more

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Java Program to Search a Particular Word in a String Using Regex

Last Updated: 23 July 2025

In Java string manipulation, searching for specific words is a fundamental task. Regular expressions (regex) offer a powerful and flexible approach to achieve this search....read more

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How to Match Phone Numbers in a List to a Regex Pattern in Java ?

Last Updated: 23 July 2025

Regular Expressions are also known as regex or regexp. It is one of the powerful features of Java that helps in sequences of characters that define a search pattern. Nowad...read more

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Capitalize the First Letter of a String in Java Using Regex

Last Updated: 23 July 2025

In Java, we can use regular expressions to make the first character of each word in Uppercase as the word is represented as a String and string is the collection of charac...read more

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Validate a Time Format (HH:mm:ss) Using Regex in Java

Last Updated: 23 July 2025

In this article, we will explore how to use regex to validate the used time format HH:mm:ss. Regular expressions (regex) offer a method, for validating time formats ensuri...read more

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How to Validate if a String Starts with a Vowel Using Regex in Java?

Last Updated: 23 July 2025

Regular Expressions in Java allow developers to create patterns for matching strings. In this article, we will learn How to Check whether the Given Character String Starts...read more

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Java-String-Programs

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Count a Group of Words in a String Using Regex in Java

Last Updated: 23 July 2025

Regular Expression is a powerful approach in Java for searching, Manipulating, and matching patterns with specific pattern requirements. In this article, we will learn to ...read more

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Java Program to Find Occurrence of a Word Using Regex

Last Updated: 23 July 2025

Java's regular expressions, or regex, let you do advanced text manipulation and matching. Regex offers a handy approach for searching for a term in a text wherever it appe...read more

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regular-expression

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How to Reset the Pattern of a Regular Expression?

Last Updated: 23 July 2025

A regular expression pattern in Java is defined using the Pattern class, which is a component of the java.util.regex package. But sometimes, we may wish to reset the inter...read more

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How to find the last index using regex of a particular word in a String?

Last Updated: 25 January 2024

To find the last index of a particular word in a string using regular expressions in Java, you can use the Matcher class along with a regular expression that captures the ...read more

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How to Replace the First Occurrence of a String Using Regex in Java?

Last Updated: 23 July 2025

Regex is a very interesting way to search for patterns in a String that the user provides. Regex stands for Regular Expressions. It consists of some patterns that can be p...read more

java-regular-expression

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How to Replace All Occurings of String Using Regex in Java?

Last Updated: 23 July 2025

Regex in Java is an interesting way to search for patterns in a string that the user provides. Expanded as Regular Expressions, It consists of some patterns that can be pl...read more

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regular-expression

Java Examples

Java - Remove White Spaces from String using Regex

Last Updated: 23 July 2025

The Regex is an expression that is used for searching a required pattern or matching a required pattern or Manipulating the input based on requirements by using regex. Thi...read more

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regular-expression

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How to Remove All Punctuation from a String using Regex in Java?

Last Updated: 05 February 2024

In this article, we will explain how to remove all punctuation from a given String by using Java with the help of Regex. Here regex means regular expression. The regex is ...read more

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Validate Variable Names According to Naming Conventions in Java

Last Updated: 23 July 2025

Let's write a Java Program that checks whether a given variable name complies with the naming convention or not using Regular Expressions in Java. Example for Validating N...read more

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