Java: Convert all the characters in a string to uppercase

Last update on December 21 2024 10:02:36 (UTC/GMT +8 hours)

Write a Java program to convert all characters in a string to uppercase.

Visual Presentation:

Sample Solution:

Java Code:

// Define a public class named Exercise30.
public class Exercise30 {
    
    // Define the main method.
    public static void main(String[] args) {
        // Declare and initialize a string variable.
        String str = "The Quick BroWn FoX!";

        // Convert the above string to all uppercase.
        String upper_str = str.toUpperCase();

        // Display the original and uppercase strings for comparison.
        System.out.println("Original String: " + str);
        System.out.println("String in uppercase: " + upper_str);
    }
}

Sample Output:

Original String: The Quick BroWn FoX!                                                                         
String in uppercase: THE QUICK BROWN FOX!  

Flowchart:

Java Code Editor:

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