public static boolean isPostalCode(String code) {

        int length = code.length();
        String newcode = code;

        if(length == 7) {

            newcode = code.replaceAll(" ", ""); // if it has 7 characters replace the middle space with nothing so it makes it 6 chars long

        }

        char temp;
        int nums = 0, letters = 0;

        for(int i = 1; i<length; i=i+2) { // loop for checking digit starting from 1 to 6 going 1 3 5

            temp = newcode.charAt(i);
            if(Character.isDigit(temp))
                nums++; // to check how many of the chars were digits

        }
        for(int i = 0; i<length-1; i=i+2) { // loop for checking letters from 0 to 4 going 0 2 4

            temp = newcode.charAt(i);
            if(Character.isLetter(temp))
                letters++; // add to num of letters

        }

        if(nums == letters && nums == 3) // if three letters and found and 3 numbers are also found return true
                return true;



        return false;
    }