Password[ITA].java

import java.util.Scanner;
import java.util.concurrent.ThreadLocalRandom;

public class Password {
    private static Scanner dd;
    public static void main(String[] args) {
        while (true) {
            password(args);
        }
    }

    public static void password(String[] args) {
        int opt1, opt2, opt3, opt4;
        String num = "0123456789";
        String upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        String lower = "abcdefghijklmnopqrstuvwxyz";
        String special = "!#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~ ";
        String extra = "";
        int log;
        dd = new Scanner(System.in);
        while (true) {
            System.out.print("Inserire numeri: [1=si / 0=no] ");
            opt1 = dd.nextInt();
            if (opt1 == 1 | opt1 == 0) {
                break;
            }
        }
        while (true) {
            System.out.print("Inserire lettere maiuscole: [1=si / 0=no] ");
            opt2 = dd.nextInt();
            if (opt2 == 1 | opt2 == 0) {
                break;
            }
        }
        while (true) {
            System.out.print("Inserire lettere minuscole: [1=si / 0=no] ");
            opt3 = dd.nextInt();
            if (opt3 == 1 | opt3 == 0) {
                break;
            }
        }
        while (true) {
            System.out.print("Inserire caratteri speciali: [1=si / 0=no] ");
            opt4 = dd.nextInt();
            if (opt4 == 1 | opt4 == 0) {
                break;
            }
        }
        System.out.print("Inserire caratteri extra da aggiungere:");
        dd.nextLine();
        extra = dd.nextLine();

        System.out.print("Inserisci lunghezza password: ");
        int leng = dd.nextInt();
        System.out.print("Inserisci password da generare: ");
        int numb = dd.nextInt();
        StringBuilder password = new StringBuilder();
        int cache = 0;
        while (numb != cache) {
            while (password.length() != leng) {
                log = ThreadLocalRandom.current().nextInt(0, 7);
                if (log == 1 & opt1 == 1) {
                    int m = ThreadLocalRandom.current()
                            .nextInt(0, num.length());
                    char n = num.charAt(m);
                    String o = Character.toString(n);
                    password.append(o);
                }
                if (log == 2 & opt2 == 1) {
                    int m = ThreadLocalRandom.current().nextInt(0,
                            upper.length());
                    char n = upper.charAt(m);
                    String o = Character.toString(n);
                    password.append(o);
                }
                if (log == 3 & opt3 == 1) {
                    int m = ThreadLocalRandom.current().nextInt(0,
                            lower.length());
                    char n = lower.charAt(m);
                    String o = Character.toString(n);
                    password.append(o);
                }
                if (log == 4 & opt4 == 1) {
                    int m = ThreadLocalRandom.current().nextInt(0,
                            special.length());
                    char n = special.charAt(m);
                    String o = Character.toString(n);
                    password.append(o);
                }
                if (log == 5 & extra.length() != 0) {
                    int m = ThreadLocalRandom.current().nextInt(0,
                            extra.length());
                    char n = extra.charAt(m);
                    String o = Character.toString(n);
                    password.append(o);
                }
            }
            System.out.println(password);
            cache++;
            password.setLength(0);
        }
    }

}