48 lines
1.3 KiB
Java
48 lines
1.3 KiB
Java
package Others;
|
|
|
|
import java.util.Collections;
|
|
import java.util.Random;
|
|
import java.util.List;
|
|
import java.util.ArrayList;
|
|
|
|
|
|
/**
|
|
* Creates a random password from ASCII letters
|
|
* Given password length bounds
|
|
*
|
|
* @author AKS1996
|
|
* @date 2017.10.25
|
|
*/
|
|
class PasswordGen {
|
|
public static void main(String args[]) {
|
|
String password = generatePassword(8, 16);
|
|
System.out.print("Password: " + password);
|
|
}
|
|
|
|
static String generatePassword(int min_length, int max_length) {
|
|
Random random = new Random();
|
|
|
|
String upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
|
|
String lower = "abcdefghijklmnopqrstuvwxyz";
|
|
String numbers = "0123456789";
|
|
String specialChars = "!@#$%^&*(){}?";
|
|
|
|
String allChars = upper + lower + numbers + specialChars;
|
|
|
|
List<Character> letters = new ArrayList<Character>();
|
|
for (char c : allChars.toCharArray())
|
|
letters.add(c);
|
|
|
|
// Inbuilt method to randomly shuffle a elements of a list
|
|
Collections.shuffle(letters);
|
|
String password = "";
|
|
|
|
// Note that size of the password is also random
|
|
for (int i = random.nextInt(max_length - min_length) + min_length; i > 0; --i) {
|
|
password += letters.get(random.nextInt(letters.size()));
|
|
}
|
|
|
|
return password;
|
|
}
|
|
}
|