Java：使用isDigit函数

Question

Hey all I am working on a program in Java that checks a password for a few things such as is it 8 characters, is one character Uppercase, is one lowercase, and is there a number in the password. So far I have wrote the methods for checking length, upper and lower case, with no problems. I cannot for the life of my understand why it isn't working with the isDigit().

No matter what input I throw in the method, it always returns true. Anyone see my error?

Thanks in advance!

public void setOneDigit(){

     int i;
     char ch;
     boolean hasNumber = false;

     for ( i = 0; i < password.length(); i++ ) {

         ch = password.charAt(i);
         if (Character.isDigit(ch));
         {    
             hasNumber = true;
         }

     }

     if(hasNumber == true)
     {
         hasOneDigit = true;
     } 
     else 
     {
          hasOneDigit = false;
     }
}

Answer 1

Classic mistake:

if (Character.isDigit(ch));
     {    
         hasNumber = true;
     }

has to be

if (Character.isDigit(ch))
     {    
         hasNumber = true;
     }