passwordGenerator

import java.io.*;
import java.util.Scanner;
import java.util.Random;
public class passwordgenerator{
private static Scanner sc = new Scanner(System.in);
public static void main(String... args)
    throws IOException{
    passOperate(passIn()); }
public static int passIn(){
    System.out.println("How long should the password be?");
    int length = sc.nextInt();
    String cr = sc.nextLine(); return length;}
public static void
    passOperate(int l){
    String[] c = new String[l];
    Random r = new Random();
    String alphabet = "qwertyuiopasdfghjklzxcvbnm";
    for(int i = 0; i < l; i++){
        int ran = (int)
        (Math.random()*10) + 1;
        if(ran >= 6)
            c[i] = "" + alphabet.charAt(r.nextInt(
                alphabet.length()));
        if(ran <= 5)
            c[i] = "" + ((int) (Math.random()*9)+1);
    }
    for(int i = 0; i<c.length;i++){
        if(c[i] != null || c[i] != " ")
        System.out.print(c[i]);}
    System.out.println();
    runAgain();
    }
public static void runAgain(){
    System.out.println("Run again? [y/n]");
    String s = sc.nextLine();
        char c = s.charAt(0);
    switch(c){
        case('y'): passOperate(passIn());
            break;
        case('n'): System.exit(0);
            break;
    }
}
}