题解 | #密码强度等级#浪费时间

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String password = in.nextLine();
            System.out.println(passwordLevel(password));
        }
    }
    public static String passwordLevel(String password) {
        int score = 0;
        int len = password.length();
        if (len <= 4) {
            score = 5;
        } else if (len <= 7 && len >= 5) {
            score = 10;
        } else {
            score = 25;
        }
        int bigL = 0;
        int smallL = 0;
        int nums = 0;
        int symbol = 0;
        for (int i = 0; i < len; i++) {
            if (isBigLetter(password.charAt(i))) {
                bigL++;
            } else if (isSmallLetter(password.charAt(i))) {
                smallL++;
            } else if (isNumber(password.charAt(i))) {
                nums++;
            } else {
                symbol++;
            }
        }
        //统计大小写字母和数字、符号
        if (bigL >= 1 && smallL >= 1) {
            score += 20;
        } else if (bigL >= 1 || smallL >= 1) {
            score += 10;
        }
        if (nums == 1) {
            score += 10;
        } else if (nums > 1) {
            score += 20;
        }
        if (symbol == 1) {
            score += 10;
        } else if (symbol > 1) {
            score += 25;
        }

        if (bigL > 0 && smallL > 0 && nums > 0 && symbol > 0) {
            score += 5;
        } else if ((bigL > 0 || smallL > 0) && nums > 0 && symbol > 0) {
            score += 3;
        } else if ((bigL > 0 || smallL > 0) && nums > 0) {
            score += 2;
        }

        if (score >= 90) {
            return "VERY_SECURE";
        } else if (score >= 80) {
            return "SECURE";
        } else if (score >= 70) {
            return "VERY_STRONG";
        } else if (score >= 60) {
            return "STRONG";
        } else if (score >= 50) {
            return "AVERAGE";
        } else if (score >= 25) {
            return "WEAK";
        } else if (score >= 0) {
            return "VERY_WEAK";
        }
        return "VERY_WEAK";
    }
    public static boolean isBigLetter(char c) {
        if (c <= 'Z' && c >= 'A') {
            return true;
        }
        return false;
    }
    public static boolean isSmallLetter(char c) {
        if (c <= 'z' && c >= 'a') {
            return true;
        }
        return false;
    }
    public static boolean isNumber(char c) {
        if (c <= '9' && c >= '0') {
            return true;
        }
        return false;
    }

}