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java.util.regex Package

Last Updated: 31 October 2025

The java.util.regex package in Java provides classes for matching character sequences against regular expressions. It allows developers to define complex search patterns a...read more

Java

java-regular-expression

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

Java

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java-regular-expression

Java-Date-Time

Java Examples

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

java-regular-expression

Java Examples

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

Java

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java-regular-expression

regular-expression

Java Examples

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

Java

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java-regular-expression

regular-expression

Java Examples

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

Java

Java Programs

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java-regular-expression

regular-expression

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

Java

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java-regular-expression

Java-String-Programs

Java Examples

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

java-regular-expression

regular-expression

Java Examples

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

java-regular-expression

regular-expression

Java Examples

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

Java

Java Programs

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java-regular-expression

regular-expression

Java Examples

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

Java

Java Programs

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java-regular-expression

regular-expression

Java Examples

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

Java Examples

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

java-regular-expression

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

java-regular-expression

regular-expression

Java Examples

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

java-regular-expression

Java Examples

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