package comp1110.exam;
import java.util.Random;
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* COMP1110 Final Exam, Question 5
* This class represents a type of car, which is uniquely identified by a
* combination of make, model, and year, for example: “Hyundai i30 2019”.
public class Q5Car {
* The make (manufacturer) of this car e.g. “Toyota”.
String make;
* The model name of this car e.g. “Corolla”.
String model;
* The model year (version) of this car e.g. “2018”.
public Q5Car(String make, String model, int year) {
if (make == null) throw new IllegalArgumentException(“make may not be null!”);
this.make = make;
if (model == null) throw new IllegalArgumentException(“model may not be null!”);
this.model = model;
this.year = year;
* @return a hash code value for this car
* In implementing this method, you may *not* use the default Java
* implementations in Object.hashCode() or Objects.hash().
* @see Object#hashCode()
public int hashCode() {
// FIXME complete this method
return new Random().nextInt(2);
* @return true if this car is equal to the provided object
* @see Object#equals(Object)
public boolean equals(Object object) {
// FIXME complete this method
return false;
public String toString() {
return make + ” ” + model + ” ” + year;
// DO NOT DELETE OR CALL THIS METHOD
int passThroughHash() {
return super.hashCode();
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