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What is WordUtils.capitalize in Java?

abhilash

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capitalize is a static method of the WordUtils class that is used to capitalize all delimiter-separated words in a string. Each word’s initial character is altered only.

  • The set of delimiters that separate the words can be passed to the method.
  • If no delimiters are specified, whitespace is considered to be the delimiter by default.

WordUtils is defined in the Apache Commons Text package. Apache Commons Text can be added to the Maven Project by adding the following dependency to the pom.xml file.

<dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-text</artifactId>
            <version>1.9</version>
</dependency>

For other versions of the commons-text package, refer to the Maven Repository.

You can import the WordUtils class as follows:

import org.apache.commons.text.WordUtils;

Syntax

public static String capitalize(final String str, final char... delimiters)

Parameters

  • final String str: string to be capitalized
  • final char... delimiters: set of delimiters

Returns

This method returns a new capitalized string.

Code

import org.apache.commons.text.WordUtils;
public class Main {
public static void main(String[] args) {
String string = "Hello educative,how are you?";
System.out.print("Delimited by whitespace - ");
System.out.print(WordUtils.capitalize(string));
System.out.print("\nDelimited by comma (,) - ");
System.out.print(WordUtils.capitalize(string, ','));
string = "lorem ipsum is a pseudo-Latin text used in web design,typography,layout,and printing in place of english to emphasise design elements over content.it's also called placeholder (or filler) text.";
System.out.print("\nDelimited by comma (, and .) - ");
System.out.print(WordUtils.capitalize(string, ',', '.'));
}
}

Example 1

  • string = "Hello educative,how are you?"
  • delimiters = []

Applying the capitalize function will result in: Hello Educative,how Are You?.

The word how is not capitalized, as it’s not delimited by whitespace.

Example 2

  • string = "Hello educative,how are you?"
  • delimiters = [',']

Applying the capitalize function will result in: Hello educative,How are you?

Here, the comma is the delimiter and hence results in two fragments, i.e., Hello educative and how are you?. Capitalizing the first character of each fragment results in Hello educative,How are you?

Example 3

  • string = "lorem ipsum is a pseudo-Latin text used in web design,typography,layout,and printing in place of english to emphasise design elements over content.it's also called placeholder (or filler) text."
  • delimiters = [',', '.']

Applying the capitalize function will result in: Lorem ipsum is a pseudo-Latin text used in web design,Typography,Layout,And printing in place of english to emphasise design elements over content.It's also called placeholder (or filler) text.

Here, the function capitalizes the first character of each fragment, separated by a comma or a full-stop.

Expected output

Delimited by whitespace - Hello Educative,how Are You?
Delimited by comma (,) - Hello educative,How are you?
Delimited by comma (, and .) - Lorem ipsum is a pseudo-Latin text used in web design,Typography,Layout,And printing in place of english to emphasise design elements over content.It's also called placeholder (or filler) text.

RELATED TAGS

java
wordutils
communitycreator

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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