Java: Replace a specified character with another character

Last update on May 21 2025 12:49:23 (UTC/GMT +8 hours)

24. Replace Character

Write a Java program to replace a specified character with another character.

Visual Presentation:

Sample Solution:

Java Code:

// Define a public class named Exercise24.
public class Exercise24 {
    
    // Define the main method.
    public static void main(String[] args) {
        // Declare and initialize a string variable.
        String str = "The quick brown fox jumps over the lazy dog.";

        // Replace all the 'd' characters with 'f' characters.
        String new_str = str.replace('d', 'f');

        // Display the original and modified strings for comparison.
        System.out.println("Original string: " + str);
        System.out.println("New String: " + new_str);
    }
}

Sample Output:

Original string: The quick brown fox jumps over the lazy dog.                                                 
New String: The quick brown fox jumps over the lazy fog.

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to replace all occurrences of a specific character in a string with another character.
• Write a Java program to replace only the first and last occurrence of a character in a string.
• Write a Java program to replace every vowel in a string with a star (*) symbol.
• Write a Java program to substitute all instances of a given character in a string while preserving the original case.

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