Java Character isTitleCase() Method

The Character.isTitleCase() method in Java is used to determine if a specified character is a titlecase character.

Table of Contents

1. Introduction
2. isTitleCase() Method Syntax
3. Examples
   • Checking Single Characters
   • Handling Non-Titlecase Characters
   • Checking Multiple Characters
4. Real-World Use Case
5. Conclusion

Introduction

The Character.isTitleCase() method is a static method in the Character class in Java. It checks whether a given character is a titlecase character. Titlecase characters are typically used to capitalize the first letter of words in titles, and they are different from uppercase characters in some languages.

isTitleCase()() Method Syntax

The syntax for the isTitleCase() method is as follows:

public static boolean isTitleCase(char ch)

• ch: The character to be tested.

The method returns:

• true if the character is a titlecase character.
• false otherwise.

Examples

Checking Single Characters

The isTitleCase(char ch) method can be used to check if a single character is a titlecase character.

Example

public class IsTitleCaseExample {
    public static void main(String[] args) {
        char titleCaseChar = '\u01C5'; // Dž
        char nonTitleCaseChar = 'A';

        boolean isTitleCase1 = Character.isTitleCase(titleCaseChar);
        boolean isTitleCase2 = Character.isTitleCase(nonTitleCaseChar);

        System.out.println("Is 'Dž' a titlecase character? " + isTitleCase1);
        System.out.println("Is 'A' a titlecase character? " + isTitleCase2);
    }
}

Output:

Is 'Dž' a titlecase character? true
Is 'A' a titlecase character? false

In this example, the method returns true for the titlecase character Dž and false for the uppercase character A.

Handling Non-Titlecase Characters

The isTitleCase() method returns false for characters that are not titlecase characters.

Example

public class NonTitleCaseCharacterExample {
    public static void main(String[] args) {
        char lowerCaseChar = 'a';
        char upperCaseChar = 'A';

        boolean isTitleCase1 = Character.isTitleCase(lowerCaseChar);
        boolean isTitleCase2 = Character.isTitleCase(upperCaseChar);

        System.out.println("Is 'a' a titlecase character? " + isTitleCase1);
        System.out.println("Is 'A' a titlecase character? " + isTitleCase2);
    }
}

Output:

Is 'a' a titlecase character? false
Is 'A' a titlecase character? false

Checking Multiple Characters

You can check multiple characters to determine which ones are titlecase characters.

Example

public class MultipleCharactersExample {
    public static void main(String[] args) {
        char[] chars = { '\u01C5', '\u01C8', '\u01CB', 'A', 'a', '1', '$' };

        for (char ch : chars) {
            boolean isTitleCase = Character.isTitleCase(ch);
            System.out.printf("Is '%c' a titlecase character? %b%n", ch, isTitleCase);
        }
    }
}

Output:

Is 'Dž' a titlecase character? true
Is 'Lj' a titlecase character? true
Is 'Nj' a titlecase character? true
Is 'A' a titlecase character? false
Is 'a' a titlecase character? false
Is '1' a titlecase character? false
Is '$' a titlecase character? false

Real-World Use Case

Identifying Titlecase Characters in Text

In a real-world application, you might need to identify and process titlecase characters in a text string.

Example

public class IdentifyTitleCaseCharactersExample {
    public static void main(String[] args) {
        String text = "DžLjNjTitle Case Example";
        StringBuilder titleCaseChars = new StringBuilder();

        for (char ch : text.toCharArray()) {
            if (Character.isTitleCase(ch)) {
                titleCaseChars.append(ch);
            }
        }

        System.out.println("Titlecase characters: " + titleCaseChars.toString());
    }
}

Output:

Titlecase characters: DžLjNj

In this example, the code identifies and extracts the titlecase characters from the text string.

Conclusion

The Character.isTitleCase() method in Java is a simple and effective way to check if a character is a titlecase character. By understanding how to use this method, you can efficiently handle text processing tasks that involve checking for titlecase characters in your Java applications. Whether you are validating individual characters, handling titlecase characters in different languages, or processing entire strings, the isTitleCase() method provides a reliable solution for these tasks.