Validation of Canadian postal code fails when whitespace inside

I'm trying to write a program that will validate a Canadian postal code.

Given the two formats

1. A1A1A1
2. A1A 1A1

Problem

I have problems getting my code to recognize the white space in the second format.

When I validate for the second format, it prints "Invalid" twice even though it's a legitimate postal code.

Code

public class validatePostalCodeTest {
  public static void main(String[] args) {
    Scanner kb = new Scanner(System.in);
    System.out.println("Please enter postalcode:");
    while (kb.hasNext()){
        String posCode = kb.next();
        if (posCode.length() > 7) 
            System.out.println("\nInvalid");
        if (posCode.length() < 6) 
            System.out.println("\nInvalid");    
        if (posCode.length()== 7){
            boolean valid = true;
            for (int i = 0; i < posCode.length(); i++){
                char a = posCode.charAt(0);
                char b = posCode.charAt(2);
                char c = posCode.charAt(4);
                char d = posCode.charAt(1);
                char e = posCode.charAt(5);
                char f = posCode.charAt(6);
                char g = posCode.charAt(3);
                if(! Character.isLetter(a))
                    valid = false; 
                else if (! Character.isLetter(b))
                    valid = false;
                else if (! Character.isDigit(c))
                    valid = false;
                else if (! Character.isDigit(d))
                    valid = false;
                else if (! Character.isLetter(e))
                    valid = false;
                else if (! Character.isDigit(f))
                    valid = false;
                else if (! Character.isWhitespace(g))
                    valid = false;
                break;
            }
            if (valid) System.out.println("\nValid");
            else System.out.println("\nInvalid");
        }
        if (posCode.length()== 6){
            boolean valid = true;
            for (int i = 0; i < posCode.length(); i++){
                char a = posCode.charAt(0);
                char b = posCode.charAt(2);
                char c = posCode.charAt(4);
                char d = posCode.charAt(1);
                char e = posCode.charAt(3);
                char f = posCode.charAt(5);
                if(! Character.isLetter(a))
                    valid = false; 
                else if (! Character.isLetter(b))
                    valid = false;
                else if (! Character.isLetter(c))
                    valid = false;
                else if (! Character.isDigit(d))
                    valid = false;
                else if (! Character.isDigit(e))
                    valid = false;
                else if (! Character.isDigit(f))
                    valid = false;
                break;                    
            }
            if (valid) System.out.println("\nValid");
            else System.out.println("\nInvalid");
        }
        System.out.println("\nPlease enter a postalcode:");
    }
    System.out.println("Program ending due to end-of-file");
  }
}

You can reduce a lot of if-else statements and reduce the lines of your code.

The following code have same logic as yours and it's checking for the postal code as you want it to:

public class validatePostalCodeTest {

    public static void main(String[] args) throws java.lang.Exception {

        Scanner kb = new Scanner(System.in);
        System.out.println("Please enter postalcode:");
        char charPC[] = kb.nextLine().toCharArray();
        boolean valid = false;

        if (charPC.length == 7) {
            if (Character.isLetter(charPC[0]) && Character.isLetter(charPC[2]) && Character.isLetter(charPC[5])
                    && Character.isDigit(charPC[4]) && Character.isDigit(charPC[1]) && Character.isDigit(charPC[6])
                    && Character.isWhitespace(charPC[3])) {
                valid = true;
            }
        }

        else if (charPC.length == 6) {
            if (Character.isLetter(charPC[0]) && Character.isLetter(charPC[2]) && Character.isLetter(charPC[4])
                    && Character.isDigit(charPC[1]) && Character.isDigit(charPC[3]) && Character.isDigit(charPC[5])) {
                valid = true;
            }
        }

        if (valid)
            System.out.println("\nValid");
        else 
            System.out.println("\nInvalid");

        System.out.println("Program ending due to end-of-file");
    }
}