Password Verification Qualification Program

Title Description

Password Requirements:

1. More than 8 bits in length

2. Include uppercase and lowercase letters. Numbers, other symbols, above four species at least three kinds

3. Can not have the same length of over 2 substring repetition

Enter a description

　　One or more sets of substrings that are longer than 2. Each group takes up one row

Output description

　　If required output: OK, otherwise output ng

Input example

021abc9000021abc9abc1021abc9000 021$BC 9000

Output example

Okngngok

Test code

1 ImportJava.util.Scanner;2 3  Public classMain {4     //more than 8 bits in length5      Public Static Booleanchecklength (String password) {6         if(Password.equals (NULL) || Password.length () <= 8){7             return false;8         }9         return true;Ten     } One     //include uppercase and lowercase letters. Numbers, other symbols, above four species at least three A      Public Static Booleancheckcharkinds (String password) { -         intUppercase = 0, lowercase = 0, digit = 0, other = 0; -         Char[] ch =Password.tochararray (); the          for(inti = 0; I < password.length (); i++) { -             if(Character.isuppercase (Ch[i])) { -Uppercase = 1; -}Else if(Character.islowercase (Ch[i])) { +lowercase = 1; -}Else if(Character.isdigit (Ch[i])) { +digit = 1; A}Else { atother = 1; -             } -         } -         if(uppercase + lowercase + digit + other >= 3) { -             return true; -         } in         return false; -     } to     //cannot have substring repetition of the same length of over 2 +      Public Static Booleancheckcharrepeat (String password) { -          for(inti = 0; I < Password.length ()-2; i++) { theString str = password.substring (i, i + 3); *              for(intj = i + 1; J < Password.length ()-2; J + +) { $                 if(Password.substring (J). Contains (str)) {Panax Notoginseng                     return false; -                 } the             } +         } A         return true; the     } +  -      Public Static voidMain (string[] args) { $Scanner sc =NewScanner (system.in); $          while(Sc.hasnextline ()) { -String Password =sc.nextline (); -             if(Checklength (password) && checkcharkinds (password) &&checkcharrepeat (password)) { theSystem.out.println ("OK"); -}Else {WuyiSystem.out.println ("NG"); the             } -         } Wu sc.close (); -     } About}

Password Verification Qualification Program