Address.java

import java.util.Objects;

public class Address implements Cloneable {

    private int streetNumber;
    private String streetName;
    private String city;
    private String state;

    public Address(int streetNumber, String streetName, String city, String state) {
        super();
        this.streetNumber = streetNumber;
        this.streetName = streetName;
        this.city = city;
        this.state = state;
    }

    @Override
    public Address clone() {
        try {
            Address clonedAddress = (Address) super.clone();
            // Perform deep copy for reference-type fields
            clonedAddress.streetName = new String(this.streetName);
            clonedAddress.city = new String(this.city);
            clonedAddress.state = new String(this.state);
            return clonedAddress;
        } catch (CloneNotSupportedException e) {
            // Should never happen since Address implements Cloneable
            throw new InternalError(e);
        }
    }

    @Override
    public boolean equals(Object other) {
        if (this == other) return true;
        if (other == null || getClass() != other.getClass()) return false;
        Address address = (Address) other;
        return streetNumber == address.streetNumber &&
                Objects.equals(streetName, address.streetName) &&
                Objects.equals(city, address.city) &&
                Objects.equals(state, address.state);
    }

    public String toString() {
        return streetNumber + " " + streetName + " " + city + ", " + state;
    }
}