Capitalize the First Letter of a String in Java Using Regex

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 characters. So, in Java, we can use pattern and matcher class methods to find the first character of a word and then replace it with its uppercase letter.

In this article, we will discuss how to make the first character of each word in Uppercase using regex.

Example of Converting the first character of each word in Uppercase

Input: geeks for geeks
Output: Geeks For Geeks

Input: hello world
Output: Hello World

Program to Make the First Character of Each Word in Uppercase Using Regex

Below is the Regular Expression to make the first character of each word in Uppercase.

Geeks For Geeks

Explanation:

• In the above program, it converted the first character of each word to uppercase in a given input string using regex.
• It uses a regular expression (\\b\\w) to identify the first letter of each word.
• The program then iterates through the matches, replacing each first letter with its uppercase equivalent.
• Finally, it prints the modified string.
• In simple, it transforms a sentence so that the first letter of each word is in uppercase.