private String firstName;

private String lastName;

private Address address;

private int age;

public Person(String fn, String ln, Address addr, int age) {

firstName = fn;

lastName = ln;

address = addr;

this.age = age;

}

public String getFirstName() {

return firstName;

}

public void setFirstName(String firstName) {

this.firstName = firstName;

}

public String getLastName() {

return lastName;

}

public void setLastName(String lastName) {

this.lastName = lastName;

}

public Address getAddress() {

return address;

}

public void setAddress(Address address) {

this.address = address;

}

public void happyBirthday() {

age++;

}

public int getAge() {

return age;

}

@Override

public boolean equals(Object obj) {

if (obj == this) {

return true;

}

if (obj instanceof Person) {

Person that = (Person) obj;

return $.eq(that.firstName, this.firstName) && $.eq(that.lastName, this.lastName) && $.eq(that.age, this.age);

}

return false;

}

@Override

public int hashCode() {

return super.hashCode();

}