Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * $Id: PassphraseUtils.java 317 2009-01-26 20:20:54Z ronys $
 *
 * Copyright (c) 2008-2009 David Muller <roxon@users.sourceforge.net>.
 * All rights reserved. Use of the code is allowed under the
 * Artistic License 2.0 terms, as specified in the LICENSE file
 * distributed with this code, or available from
 * http://www.opensource.org/licenses/artistic-license-2.0.php
 */

public class Main {
    /**
     * The minimum length that a password must be to be not weak.
     */
    public static final int MIN_PASSWORD_LEN = 4;

    /**
     * Checks the password against a set of rules to determine whether it is
     * considered weak.  The rules are:
     * </p><p>
     * <ul>
     *   <li>It is at least <code>MIN_PASSWORD_LEN</code> characters long.
     *   <li>At least one lowercase character.
     *   <li>At least one uppercase character.
     *   <li>At least one digit or symbol character.
     * </ul>
     *
     * @param password the password to check.
     *
     * @return <code>true</code> if the password is considered to be weak,
     *         <code>false</code> otherwise.
     */
    public static boolean isWeakPassword(String password) {
        boolean hasUC = false;
        boolean hasLC = false;
        boolean hasDigit = false;
        boolean hasSymbol = false;

        if (password.length() < MIN_PASSWORD_LEN) {
            return true;
        }

        for (int ii = 0; ii < password.length(); ++ii) {
            char c;

            c = password.charAt(ii);

            if (Character.isDigit(c))
                hasDigit = true;
            else if (Character.isUpperCase(c))
                hasUC = true;
            else if (Character.isLowerCase(c))
                hasLC = true;
            else
                hasSymbol = true;
        }

        return !(hasUC && hasLC && (hasDigit || hasSymbol));
    }
}