Generate a Secure Random Password in Java with Minimum Special Character Requirements

Question

How do I create a random password that meets the system\'s length and character set requirements in Java?

I have to create a random password that is 10-14 characters lo

Answer 1

Using the random functionality of java.util package of rt.jar, we can create a random password of any length. below is the snippet for the same.

public class GeneratePassword {

public static void main(String[] args)
{
        int length = 10;
        String symbol = "-/.^&*_!@%=+>)"; 
        String cap_letter = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; 
        String small_letter = "abcdefghijklmnopqrstuvwxyz"; 
        String numbers = "0123456789"; 


        String finalString = cap_letter + small_letter + 
                numbers + symbol; 

        Random random = new Random(); 

        char[] password = new char[length]; 

        for (int i = 0; i < length; i++) 
        { 
            password[i] = 
                    finalString.charAt(random.nextInt(finalString.length())); 

        } 
        System.out.println(password);
}

}