题解 | #密码验证合格程序#

省去不必要的步骤

import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNext()){
            String str = sc.nextLine();
            if(JudgeCode(str) == false){
                System.out.println("NG");
            }else{
                System.out.println("OK");
            }
        }
    }

    public static boolean JudgeCode(String str){
        int count_1 = 0, count_2 = 0, count_3 = 0, count_4 = 0;
        char[] s = str.toCharArray();
        for(int i = 0; i < s.length; i++){
            if(Character.isDigit(s[i])){
                count_1 = 1;
            }else if(Character.isUpperCase(s[i])){
                count_2 = 1;
            }else if(Character.isLowerCase(s[i])){
                count_3 = 1;
            }else{
                count_4 = 1;
            }
        }
        
        int ans = count_1 + count_2 + count_3 + count_4;
        boolean sol = true;
        //判断密码是否有至少3种以上不同类型的输入
        if(ans < 3){
            sol = false;
        }else{
            //判断密码长度是否超过8位
            if(s.length < 8){
                sol = false;
            }
            //判断是否有子串重复
            int left =  0, right = 3;
            while (right < s.length){
                if (str.substring(right).contains(str.substring(left, right))) {
                    sol =  false;
                }
                left++;
                right++;
            }
        }
        return sol;
    }
}