题解 | #密码强度等级#

//  if else较多  大家是否有可优化的地方？

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.hasNext()) { // 注意 while 处理多个 case
            // 密码长度 4 5-7 8
            // 字母
            // 数字 0 1 >1
            // 符号 0 1 >1
            // 奖励 取最大奖励
            // 累加得到最后的评分

            String pwd = in.next();
            int sumScore = 0;

            boolean hasLowLetter = false;
            boolean hasUpperLetter = false;
            int numberSum = 0;
            int otherSum = 0;

            int length = pwd.length();
            if (length <= 4) sumScore += 5;
            else if (length >= 5 && length <= 7) sumScore += 10;
            else if (length >= 8) sumScore += 25;

            for (int i = 0; i < pwd.length(); i++) {
                char value = pwd.charAt(i);
                if (Character.isDigit(value)) {
                    numberSum++;
                } else if (Character.isUpperCase(value)) {
                    hasUpperLetter = true;
                } else if (Character.isLowerCase(value)) {
                    hasLowLetter = true;
                } else {
                    otherSum++;
                }
            }

            // 积分
            if (numberSum == 1) sumScore += 10;
            else if (numberSum > 1) sumScore += 20;
            if (hasUpperLetter && hasLowLetter) sumScore += 20;
            else if (hasUpperLetter || hasLowLetter) sumScore += 10;
            if (otherSum == 1) sumScore += 10;
            else if (otherSum > 1) sumScore += 25;

            // 奖励
            if (hasUpperLetter && hasLowLetter && numberSum >= 1 &&
                    otherSum >= 1) sumScore += 5;
            else if ((hasUpperLetter || hasLowLetter) && numberSum >= 1 &&
                     otherSum >= 1) sumScore += 3;
            else if ((!hasUpperLetter && !hasLowLetter) && numberSum >= 1 &&
                     otherSum >= 1) sumScore += 2;

            if (sumScore >= 0 && sumScore < 25) {
                System.out.println("VERY_WEAK");
            } else if (sumScore >= 25 && sumScore < 50) {
                System.out.println("WEAK");
            } else if (sumScore >= 50 && sumScore < 60) {
                System.out.println("AVERAGE");
            } else if (sumScore >= 60 && sumScore < 70) {
                System.out.println("STRONG");
            } else if (sumScore >= 70 && sumScore < 80) {
                System.out.println("VERY_STRONG");
            } else if (sumScore >= 80 && sumScore < 90) {
                System.out.println("SECURE");
            } else {
                System.out.println("VERY_SECURE");
            }
        }
    }
}