Address

public class Address {

    String houseName = "";
    String roadNo = "";
    String area = "";
    PostOffice PO;
    String city = "";
    Country country;

    Address(String houseName, String roadNo, String area, String city, Country country) {
        this.houseName = houseName;
        this.roadNo = roadNo;
        this.area = area;
        this.city = city;
        this.country = country;
    }

    Address(String houseName, String roadNo, PostOffice PO, String city, Country country) {
        this.houseName = houseName;
        this.roadNo = roadNo;
        this.PO = PO;
        this.city = city;
        this.country = country;
    }

    public void getAddress() {

        if (this.area != "") {
            System.out.print("House name     : " + this.houseName + "\n"
                    + "Road no        : " + this.roadNo + "\n"
                    + "Area           : " + this.area + "\n"
                    + "City           : " + this.city + "\n");
            country.getCountry();
        } else {
            System.out.print("House name     : " + this.houseName + "\n"
                    + "Road no        : " + this.roadNo + "\n");
            PO.getPostOffice();
            System.out.print("City           : " + this.city + "\n");
            country.getCountry();
        }
    }

}