java - Reading and comparing strings in a text file, variables not initialized -


i'm getting error

the local variables name , password may not have been initialized,

for if-statement. these errors go away if change second string in parentheses in quotes, or if set variables 0, need change them int , need them string.

i'm trying compare username , password text file newly input username , password. program should quit after 3 bad attempts put system.out.println("goodbye!"); in wrong place too.

public static void main(string[] args) {          int numberofattempts = 1;         string filename = "logins.txt";         scanner inputstream = null;         string name, password, line, secondname;         string secondpassword;                   {             system.out.println("please enter username: ");             scanner keyboard = new scanner(system.in);             secondname = keyboard.nextline();             system.out.println("please enter password: ");             secondpassword = keyboard.nextline();             try             {                 inputstream = new scanner(new file(filename));             }             catch(filenotfoundexception e)             {                 system.out.println("error opening file " +                          filename);                 system.exit(0);             }             while (inputstream.hasnextline())                {                    line = inputstream.nextline();                }             if ((name.equalsignorecase(secondname))&&                     (password.equalsignorecase(secondpassword)))             {system.out.println("welcome!");             numberofattempts = 4;             }              else                 system.out.println("invalid. please try again.");             numberofattempts++;          }          while ( numberofattempts <4);         system.out.println("goodbye!");           inputstream.close();      }  }

you never initialize name , password, of course you'll error.

you initialize secondname , secondpassword, condition checks name , password not initialized.


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