Thread: Parse then analyze with an array?

Okay after hours of scouring google and stackoverflow I kind of have a solution. It doesn't look very pretty and it feels like I put it together using duck tape but here is what I got. I'm studying for my Security+ certification right now so that's where I got the C^N formula from.

package sandbox;
 
import javax.swing.JOptionPane;
import java.util.regex.*;
 
class Strength {
 
	public static void main(String[] args){
	String password =JOptionPane.showInputDialog("Enter your password here:");
		//parse password to turn set c and n value;
		int c = 0;
 
		 //let's figure things out
		 int uppercase = 0, lowercase = 0, numbers = 0, specChars = 0;
		 for (int i=0; i<password.length(); i++){
			 if(Character.isUpperCase(password.charAt(i))) uppercase++;
			 else if (Character.isLowerCase(password.charAt(i))) lowercase++;
		 }
		 Pattern p = Pattern.compile("^a-zA-Z0-9");
		 Matcher m = p.matcher(password);
		 boolean b = m.matches();
		 if (b == false){
			 specChars = specChars +1;
		 }
		 if(password.matches(".*[0-9]*.")){
			 numbers++;
		 }
		 //Let's add!
		 if(uppercase> 0){
			 c = c + 26;
		 }
		 if(lowercase> 0){
			 c = c + 26;
		 }
		 if(numbers>0){
			 c = c + 10;
		 }
		 if(specChars>0){
			 c = c + 10;
		 }
		int n = password.length();
		double pStrength = Math.pow(c,n);
 
		System.out.println("C ="+ c);
		System.out.println("N ="+ n);
		System.out.println("C^N ="+ pStrength);
 
		if (pStrength >= Math.pow(72,12)){
			System.out.println("Your password is strong enough to store DoD files.");
		}
		else if (pStrength <= Math.pow(72,12)){
			System.out.println("Your password is NOT strong enough to store DoD files.");
	}
 
}
	}