Java: Input and display your password

Last update on May 12 2025 13:19:46 (UTC/GMT +8 hours)

Input and Display Password

Write a Java program to input and display your password.

Pictorial Presentation:

Sample Solution:

Java Code:

import java.io.Console;

public class Example42 {
    public static void main(String[] args) {
        // Declare a Console variable 'cons'.
        Console cons;

        // Check if the system console is available.
        if ((cons = System.console()) != null) {
            // Declare a character array 'pass_ward' to store the password.
            char[] pass_ward = null;

            try {
                // Prompt the user to input their password.
                pass_ward = cons.readPassword("Input your Password:");

                // Display the password to the console.
                System.out.println("Your password was: " + new String(pass_ward));
            } finally {
                // Ensure that the password array is securely cleared.
                if (pass_ward != null) {
                    java.util.Arrays.fill(pass_ward, ' ');
                }
            }
        } else {
            // If the system console is not available, throw a runtime exception.
            throw new RuntimeException("Can't get the password... No console");
        }
    }
}

Sample Output:

Input your Password:                                                    
Your password was: abc@123

Flowchart:

For more Practice: Solve these Related Problems:

• Write a program to mask password input.
• Modify the program to validate password strength.
• Encrypt and display the entered password.
• Check if two entered passwords match.

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