46 lines
1.3 KiB
Java
46 lines
1.3 KiB
Java
import java.util.Collections;
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import java.util.Random;
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import java.util.List;
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import java.util.ArrayList;
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/*
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Creates a random password from ASCII letters
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Given password length bounds
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author: AKS1996
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date: 2017-10-25
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*/
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class PasswordGen {
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public static void main(String args[]){
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String password = generatePassword(8,16);
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System.out.print("Password: " + password);
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}
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static String generatePassword(int min_length, int max_length){
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Random random = new Random();
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String upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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String lower = "abcdefghijklmnopqrstuvwxyz";
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String numbers = "0123456789";
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String specialChars = "!@#$%^&*(){}?";
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String allChars = upper+lower+numbers+specialChars;
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List<Character> letters = new ArrayList<Character>();
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for(char c:allChars.toCharArray())
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letters.add(c);
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// Inbuilt method to randomly shuffle a elements of a list
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Collections.shuffle(letters);
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String password = "";
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// Note that size of the password is also random
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for(int i = random.nextInt(max_length-min_length) + min_length; i>0; --i) {
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password += letters.get(random.nextInt(letters.size()));
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}
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return password;
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}
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}
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