Here is my program: import java.util.Scanner; // Needed for the Scanner class pu

ID: 3553675 • Letter: H

Question

Here is my program:

import java.util.Scanner; // Needed for the Scanner class

public class PasswordVerifier {

public static void main(String[] args) {

// Create a Scanner object to read input.

Scanner keyboard = new Scanner(System.in);

String input;// To hold the input

// Ask the user to enter their password

System.out.print("Please enter your password: ");

input = keyboard.nextLine();

// Demonstrate the method by passing the inputted string.

if (authenticate(input))

System.out.print("Valid password. You may proceed");

else

System.out.print("This password is invalid");

System.out.println();

}

//Method: Accepts a String object (password) as an argument

//and verifies whether it meets the criteria of a valid password.

private static boolean authenticate(String pass)

{

// The password should be at least six characters long.

// The password should contain at least one uppercase

// and at least one lowercase letter.

// The password should have at least one digit.

return (pass.length() == 6) &&

(pass.matches("[A-Z]")) &&

(pass.matches("[a-z]")) &&

(pass.matches("[0-9]"));

}

The program does not work. There are no errors, but the password is ALWAYS invalid. How do I fix it?

Explanation / Answer

/* package whatever; // don't place package name! */

import java.util.*;

import java.lang.*;

import java.io.*;

import java.util.regex.Pattern;

/* Name of the class has to be "Main" only if the class is public. */

class Ideone

{

public static void main (String[] args) throws java.lang.Exception

{