Question

Write a function in Java to generate a password and test whether it meets specific
complexity criteria. Be creative with how you generate passwords - strong passwords
have a mix of at least three of these attributes - lowercase letters, uppercase letters,
numbers, and symbols. You can even prompt the user to ask them the strength of
the password and adjust what is generated as an enhancement if you like. The
passwords should be random, generating a new password every time the user asks
for a new password. Passwords that you test for complexity strength should also
meet the minimum criteria that you are using to generate them.

Answer 1

Code

import java.util.Scanner;
import java.security.SecureRandom;
public class Password
{
private static SecureRandom random = new SecureRandom();

/** different dictionaries used */
private static final String ALPHA_CAPS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
private static final String ALPHA = "abcdefghijklmnopqrstuvwxyz";
private static final String NUMERIC = "0123456789";
private static final String SPECIAL_CHARS = "!@#$%^&*_=+-/";

public static String generatePassword(int len)
{
String dic=ALPHA+ALPHA_CAPS+NUMERIC+SPECIAL_CHARS;
String result = "";
  
for (int i = 0; i < len; i++) {
int index = random.nextInt(dic.length());
result += dic.charAt(index);
}
return result;
}

public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
int strength;
System.out.print("Enter the strength of the password: ");
strength=sc.nextInt();
System.out.println("Your password is : "+generatePassword(strength));
}
  
  
}
outputs

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