Thread: Java password generator program to generate 8 random integers

So I'm trying to create a password generator that generates 8 random integers.

48-57
65-90
97-122

so basically any letter uppercase or lower case and numbers.

I think I'm on the right track but I could really use some help. Please show me how this could be done.

import java.util.Random;
import java.util.*;
 
public final class PasswordGenerator {
    public static final void main(String[] args) {
 
int num, counter, randomNum;
counter = 0;
String password = "";
 
while (counter < 8)
{
  randomNum = (int)(Math.random()*100);
  if (randomNum => 65) 
    num = Random.range(97,122);
 
     else if...

Hello Lizard,

I'm not sure what you are trying to do here?

Please give me an example output.

Afternoon Lizard,

How about this code?

It's completely random. The generated password contains numbers from 0 to 9, keyboard charactor including lower & upper case A-Z.

public class PasswordGenerator {
 
    /**
     * JavaProgrammingForums.com
     */
    public static int count, random, intOrChar, upperOrLower;
    public static char myChar;
    public static String lowerCase, password, finalPasswd;
 
    public static void main(String[] args) {
 
        while (count < 8) {
 
            // Integer or character
            intOrChar = (int) (Math.random() * 2);
 
            // if 0 then Integer
            if (intOrChar == 0) {
 
                // Print random number 0-9
                random = (int) (Math.random() * 9);
                //System.out.print(random);
                password = Integer.toString(random) + password;
 
                // if 1 then character
            } else if (intOrChar == 1) {
 
                // decide lower or upper case
                upperOrLower = (int) (Math.random() * 2);
 
                // if 0 then upper case
                if (upperOrLower == 0) {
 
                    // Print random Capital char
                    random = (int) (Math.random() * 74);
                    myChar = (char) (random + '0');
                    //System.out.print(myChar);
                    password = Character.toString(myChar) + password;
 
                    // if 1 then lower case
                } else if (upperOrLower == 1) {
 
                    // Print random Small char
                    random = (int) (Math.random() * 74);
                    myChar = (char) (random + '0');
                    lowerCase = Character.toString(myChar).toLowerCase() + password;
                    //System.out.print(lowerCase);
                    password = lowerCase;
 
                }
 
            }
 
            count++;
        }
        finalPasswd = password.replace("null", "");
        System.out.println(finalPasswd);
    }
 
}

Example output:

e05A34z5