What is StringUtils.capitalize in Java?

capitalize is a static method of the StringUtils class that is used to convert the first character of the given string to title case as per Character.toTitleCase. The remaining characters of the string are not changed.

For example:

string = "ababaaaabbbcccac"

capitalize returns Ababaaaabbbcccac, changing the case of the first character to title case.

Add apache commons-lang package

StringUtils is defined in the Apache Commons Lang package. Apache Commons Lang 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-lang3</artifactId>
            <version>3.12.0</version>
</dependency>

Note: For other versions of the commons-lang package, refer to the Maven Repository.

Import StringUtils

You can import the StringUtils class as follows.

import org.apache.commons.lang3.StringUtils;

Syntax

public static String capitalize(final String str)

Parameters

final String str is the string to be capitalized.

Returns

The method capitalize() returns the capitalized string.

Code

import org.apache.commons.lang3.StringUtils;
public class Main {
    public static void main(String[] args) {
        System.out.println(StringUtils.capitalize("ababaaaabbbcccac"));
        System.out.println(StringUtils.capitalize("'hello'"));
    }
}

Output

Ababaaaabbbcccac
'hello'

The second string remains the same as the input string, and the first character remains a single quote.

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