StringUtils capitalize() Method in Java

StringUtils capitalize() Method in Java | In this blog, we will discuss how to capitalize the string by using built-in methods in StringUtils class. There is a method called capitalize() in StringUtils class which will capitalize only the first character in the string.

StringUtils.capitalize() Method

The syntax for the capitalize method is as follows:-
public static String capitalize(final String str)
It capitalizes a String changing the first character to the title case, no other characters are changed.
Parameter: str, the first letter string needed to be capitalized.
Return type: string
Returns: the capitalized string.

An example of capitalize method is as follows:-
Example-1:
String: “hello”
After capitalizing only the first letter using StringUtils.capitalize() = “Hello”

Example-2:
String: “apple”
After capitalizing only the first letter using StringUtils.capitalize() = “Apple”

Example-3:
String: “mAngo”
After capitalizing only the first letter using StringUtils.capitalize() = “MAngo”

StringUtils.capitalize() Example in Java

import org.apache.commons.lang3.StringUtils;

public class Main {
    public static void main(String[] args) {
        String string = "banana";
        System.out.println("String: " + string);
        System.out.println("StringUtils.capitalize(string): " 
            + StringUtils.capitalize(string));

        string = "aPRICOT";
        System.out.println("String: " + string);
        System.out.println("StringUtils.capitalize(string): " 
            + StringUtils.capitalize(string));

        string = "PIne apple";
        System.out.println("String: " + string);
        System.out.println("StringUtils.capitalize(string): " 
            + StringUtils.capitalize(string));

        string = "tOmato";
        System.out.println("String: " + string);
        System.out.println("StringUtils.capitalize(string): " 
            + StringUtils.capitalize(string));
    }
}

Output:-

String: banana
StringUtils.capitalize(string): Banana
String: aPRICOT
StringUtils.capitalize(string): APRICOT
String: PIne apple
StringUtils.capitalize(string): PIne apple
String: tOmato
StringUtils.capitalize(string): TOmato

The capitalize method is used to capitalize only the first character of the string. In the above code, we have used the signature of the method “StringUtils.capitalize(String str)” and passed four different types of strings to see the output for different scenarios.

This method works the same in all the cases, the main use of this method is to make the string in heading format so that only the first letter gets capitalized. And the remaining other characters remain as it is.

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