Password Verification Program Java -

i working on final project java class , need little help! first going show instructions, code , problem.

instructions

1. write program prompts user enter password.
2. create boolean variable named valid , set true. if of these tests below fail, set true.
3. check password see if has @ least 8 characters. if not, display message, "password must have @ least 8 characters"

4. check password see if consists of letter , digits. this, need loop through of characters in string. character c letter of digit if expression true:

   ('a' <= c && c <= 'z') || ('a' <= c && c <= 'z') || ('0' <= c && c <= '9')

if not true, break loop , display message, "password must contain letter , digits" 5. if valid still true @ end of program, display message, "password accepted!"

my code

import java.util.scanner;  public class passwordverification {      public static void main(string[] args) { //      creates scanner         scanner sc = new scanner(system.in);         boolean valid = false;          string password;   //      asks user enter password         system.out.print("please enter password , hit enter:");         password = sc.nextline();   //      checks see if password @ least 8 characters.          if (password.length()<8)              {                 valid = false;                 system.out.println("password must have @ least 8 characters");             }  //      checks each character see if acceptable.         (int = 0; < password.length(); i++){                     char c = password.charat(i);                      if (       ('a' <= c && c <= 'z') // checks if lower case letter                             || ('a' <= c && c <= 'z') //checks if upper case letter                             || ('0' <= c && c <= '9') //checks see if digit                     )                      {                          valid = true;                     }                       else                      {                         // tells user letters & digits allowed                         system.out.println("only letter & digits acceptable.");                         valid = false;                         break;                     }          }          // if password valid, tell user it's accepted         system.out.println("password accepted");         }   } 

so there instructions , code have far. sooooo close being done having problems part four. expected output should be:

please enter password: abc password have @ least 8 characters  please enter password: abcd1234$ password must contain letter , digits please enter password: #### password must have @ least 8 characters password must contain letters , digits please enter password: abcd1234 password accepted! 

when type abc get:

please enter password , hit enter:abc password must have @ least 8 characters password accepted 

when program ends! me this, please? in advanced. =) also, java programming class.

as @cralfaro stated have repeat process if password invalid:

import java.util.scanner;  public class passwordverification {      public static void main(string[] args) {         //      creates scanner         scanner sc = new scanner(system.in);         boolean valid = false;          string password;          { // start loop             //      asks user enter password             system.out.print("please enter password , hit enter:");             password = sc.nextline();               //      checks see if password @ least 8 characters.              if (password.length()<8)              {                 valid = false;                 system.out.println("password must have @ least 8 characters");                 continue; // skip next iteration             }              //      checks each character see if acceptable.             (int = 0; < password.length(); i++){                 char c = password.charat(i);                  if (       ('a' <= c && c <= 'z') // checks if lower case letter                         || ('a' <= c && c <= 'z') //checks if upper case letter                         || ('0' <= c && c <= '9') //checks see if digit                 )                  {                      valid = true;                 }                 else                  {                     // tells user letters & digits allowed                     system.out.println("only letter & digits acceptable.");                     valid = false;                     break;                 }              }         } while(!valid); // verify if password valid, if not repeat process          // if password valid, tell user it's accepted         system.out.println("password accepted");     }   } 

in way program continue ask user input if password not valid.

edit: gc_'s comment, problem missed continue statement in first check.