PostOffice

public class PostOffice {

    String POname = "";
    String areaName = "";
    String zipCode = "";
    String contactNumber = "";
    String officerInCharge = "";

    PostOffice(String POname, String areaName, String zipCode, String contactNumber, String officerInCharge) {
        this.POname = POname;
        this.areaName = areaName;
        this.zipCode = zipCode;
        this.contactNumber = contactNumber;
        this.officerInCharge = officerInCharge;
    }

    PostOffice(String POname, String areaName, String zipCode) {
        this.POname = POname;
        this.areaName = areaName;
        this.zipCode = zipCode;
    }

    void getPostOffice() {
        if (contactNumber != "") {

            System.out.println("Post Office    : " + this.POname + "\n"
                + "Area           : " + this.areaName + "\n"
                + "Zip Code       : " + this.zipCode + "\n"
                + "PO contact     : " + this.contactNumber + "\n"
                + "Off In Charge  : " + this.officerInCharge + "\n");
        } else {
            System.out.println("Post Office    : " + this.POname + "\n"
                + "Area           : " + this.areaName + "\n"
                + "Zip Code       : " + this.zipCode + "\n");
        }

    }
}