Units 1 to 4 Lesson
public class Car {
public static void main(String[] args) {
int year = 2023;
double price = 30000.00;
boolean isElectric = true;
System.out.println("Year: " + year);
System.out.println("Price: $" + price);
System.out.println("Is Electric: " + isElectric);
}
}
import java.util.Scanner;
public class CarPrice {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter the price of the car: ");
double price = scanner.nextDouble();
System.out.println("The price of the car is $" + price);
scanner.close();
}
}
int cars = 0; // starting number of cars
int numCarsEntering = 2; // number of cars entering at a time
int numIterations = 5; // number of times to loop
for (int i = 0; i < numIterations; i++) {
cars += numCarsEntering; // use compound operator to add numCarsEntering to cars
System.out.println("Number of cars on highway: " + cars);
}
import java.util.Scanner;
public class Hack1 {
public static void main(String[] args) {
//calculate wheels
Scanner scanner = new Scanner(System.in);
System.out.print("Enter the number of cars: ");
int num = scanner.nextInt();
System.out.print(num+"\n");
int wheels = num * 4;
System.out.println("The number of wheels is: " + wheels);
scanner.close();
}
}
Hack1.main(null);
public class Car {
public static void main(String[] args) {
String[] make = {"Toyota", "Honda", "Ford"};
String[] model = {"Corolla", "Accord", "Mustang"};
int[] year = {2022, 2018, 2020, 2018};
double[] price = {24999.99, 18999.99, 34999.99};
boolean[] isUsed = {false, true, true};
for(int i = 0; i < make.length; i++) {
System.out.println("Make: "+make[i]+", Model: "+model[i]+", Year: "+year[i]+", Price: "+price[i]+", Used? "+isUsed[i]);
}
}
}
Car.main(null);
boolean isEngineRunning = true;
int speed = 60;
boolean isSpeedAboveThreshold = speed > 50;
if (isEngineRunning && isSpeedAboveThreshold) {
System.out.println("The car is moving fast!");
} else {
System.out.println("The car is not moving fast.");
}
public class Car {
private String make;
private String model;
private int year;
private double price;
// Constructor
public Car(String make, String model, int year, double price) {
this.make = make;
this.model = model;
this.year = year;
this.price = price;
}
// Getter methods
public String getMake() {
return make;
}
public String getModel() {
return model;
}
public int getYear() {
return year;
}
public double getPrice() {
return price;
}
// Method to determine if the car is affordable or not
public boolean isAffordable(double budget) {
if (price <= budget) {
return true;
} else {
return false;
}
}
// Main method
public static void main(String[] args) {
// Create a new Car object
Car car1 = new Car("Toyota", "Camry", 2019, 25000.0);
// Print the car details
System.out.println("Car Details:");
System.out.println(car1.getMake());
System.out.println(car1.getModel());
System.out.println(car1.getYear());
System.out.println(car1.getPrice()+"\n");
// Check if the car is affordable with a budget of $20000 using an if-else statement
if (car1.isAffordable(20000.0)) {
System.out.println("The car is affordable!\n");
} else {
System.out.println("The car is not affordable!\n");
}
// Check if the car is a luxury car based on its price using if-else-if statement
if (car1.price > 50000) {
System.out.println("The car is a luxury car.");
} else {
System.out.println("The car is not a luxury car.");
}
}
}
Car.main(null);
Hack 4
You are tasked with creating a program that allows a user to enter the number of cars they own, and then input the make and model of each car. The program will then print out the list of cars.
Here are the specific requirements:
- Use a try-catch statement to catch any input/output exceptions that may occur.
- Use a while loop to ensure that the user enters a positive integer for the number of cars they own.
- Use a for loop to iterate over each car and prompt the user to enter the make and model of the car.
import java.util.Scanner;
public class Car {
private String make;
private String model;
private static String customMake;
private static String customModel;
// Constructor
public Car(String make, String model) {
this.make = make;
this.model = model;
}
// Getter methods
public String getMake() {
return make;
}
public String getModel() {
return model;
}
// Main method
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("Enter the number of cars you own: ");
int num = scanner.nextInt();
System.out.println("You own "+num+" cars!\n");
System.out.println("Let's make a list!\n");
String yes = scanner.nextLine();
while (num > 0) {
String carList[][] = new String[num][2];
for (int i = 0; i < num; i++) {
Car customCar = new Car(customMake, customModel);
System.out.println("Enter the make of your car: ");
String customMake = scanner.nextLine();
System.out.println("Enter the model of your car: ");
String customModel = scanner.nextLine();
System.out.println("You own a "+customMake+" "+customModel+"!\n");
carList[i][0] = customMake;
carList[i][1] = customModel;
}
scanner.close();
for(int j = 0; j < carList.length; j++) {
System.out.print("Car #"+(j+1)+": ");
for(int k = 0; k < carList[0].length; k++) {
System.out.print(carList[j][k] + " ");
}
System.out.println(" ");
}
num = 0;
}
}
}
Car.main(null);
public class CarLab { // CarLab is a class that represents a car
private String name;
// Hack: add columns for other attributes, (ex total mileage, model, make of car) demonstrating knowledge of different data types
private double price;
private String make;
private String model;
private int mpg;
public CarLab(String name, double price, String make, String model, int mpg) {
this.name = name;
this.price = price;
this.make = make;
this.model = model;
this.mpg = mpg;
}
public CarLab(String name, int mpg) {
this.name = name;
this.mpg = mpg;
}
public CarLab(String name, double price) {
this.name = name;
this.price = price;
}
public CarLab(String name, double price, int mpg) {
this.name = name;
this.price = price;
this.mpg = mpg;
}
public double getPrice() {
return price;
}
public String getName() {
return name;
}
public String getMake() {
return make;
}
public String getModel() {
return model;
}
public int getMpg() {
return mpg;
}
public static String cheaperCar(String car1Name, double car1Price, String car2Name, double car2Price) {
CarLab car1 = new CarLab(car1Name, car1Price);
CarLab car2 = new CarLab(car2Name, car2Price);
if (car1.getPrice() < car2.getPrice()) {
return car1.getName();
} else {
return car2.getName();
}
}
public static boolean isSustainable(String car5Name, int car5Mpg) {
CarLab car5 = new CarLab(car5Name, car5Mpg);
return (car5.getMpg() > 40);
}
public static String cheaperSustainableCar(String car3Name, double car3Price, int car3Mpg, String car4Name, double car4Price, int car4Mpg) {
CarLab car3 = new CarLab(car3Name, car3Price, car3Mpg);
CarLab car4 = new CarLab(car4Name, car4Price, car4Mpg);
if (car3.getPrice() < car4.getPrice()) {
if (car3.getMpg() < car4.getMpg()) {
return (car3.getName() + " is cheaper but less sustainable!");
} else {
return (car3.getName() + " is cheaper and more sustainable!");
}
} else {
if (car3.getMpg() < car4.getMpg()) {
return (car4.getName() + " is cheaper and more sustainable!");
} else {
return (car4.getName() + " is cheaper but less sustainable!");
}
}
}
public static String cheaperCar(CarLab car1, CarLab car2) { // Overloading the cheaperCar method to allow both String and CarLab objects to be passed in
if (car1.getPrice() < car2.getPrice()) {
return car1.getName();
} else {
return car2.getName();
}
}
// Hack: demonstrate another operation on a different data type
public static int acceleration(double s1, double s2, double time) {
return (Math.abs((int) ((s2 - s1) / time)));
}
public String toString() {
return( "{" +
"\"name\": " + name + "," +
"\"price\": " + price +
"}" );
}
public static void main(String[] args) {
String cheaperCarName = cheaperCar("Toyota", 20000.0, "Honda", 25000.0);
System.out.println("The cheaper car is: " + cheaperCarName);
System.out.println("The acceleration is: " + acceleration(0, 60, 10) + " m/s^2");
System.out.println("The car is sustainable: " + isSustainable("Palisade", 60));
String cheaperSustainableCar = cheaperSustainableCar("Toyota", 20000.0, 56, "Honda", 25000.0, 43);
System.out.println("The cheaper car with consideration to sustainability: " + cheaperSustainableCar);
}
}
CarLab.main(null);