4 Commits
9 changed files with 364 additions and 86 deletions
Generated
+1 -1
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@@ -1,6 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="VcsDirectoryMappings">
<mapping directory="$PROJECT_DIR$" vcs="Git" />
<mapping directory="" vcs="Git" />
</component>
</project>
+107 -84
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@@ -1,125 +1,148 @@
package org;
import org.behavior.Serviceable;
import org.model.*;
import org.util.VehicleInspector;
import java.util.Objects;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// ============================================================
// TODO 1:
// Create one instance of each vehicle type:
// - ElectricCar
// - GasCar
// - SportsCar
//
// Requirements:
// • Use the constructors you created in each class.
// • Provide realistic values (brand, model, year, mileage, etc.).
// • Store them in variables such as:
// ElectricCar tesla = new ElectricCar(...);
// ============================================================
ElectricCar tesla = new ElectricCar("tesla", "Model 3", 2023, 1000, 5, 75, 90.0);
GasCar Toyota = new GasCar("Toyota", "Corolla", 2021, 15000, 5, 80, "gasoline");
SportsCar DodgeDemon = new SportsCar("Dodge", "Challenger Demon", 2018, 5000, 5, 70, "gasoline", 2.3);
HybridCar Lamborghini = new HybridCar("Lamborghini", "Aventador J (Hybrid)",2024, 1200, 2, 25.0, 60.0);
// ============================================================
// TODO 2:
// Create an array of Vehicle:
// Vehicle[] vehicles = { ... };
//
// This array MUST contain the objects created above.
// This demonstrates **polymorphism** because all different
// subclasses (ElectricCar, GasCar, SportsCar) are stored
// as their parent type (Vehicle).
// ============================================================
Scanner scanner = new Scanner(System.in);
Vehicle[] vehicles = {tesla, Toyota, DodgeDemon, Lamborghini};
Serviceable[] serviceable = {tesla, Toyota, DodgeDemon, Lamborghini};
while (true) {
System.out.println(" ======= menu ======= ");
System.out.println("choose one option: ");
System.out.println("1.show all basic info");
System.out.println("2.show details");
System.out.println("3.inspect all cars");
System.out.println("4.servise the cars");
System.out.println("5.incease mileage for a car");
System.out.println("6.refeul a car");
System.out.println("7.exit");
int input = scanner.nextInt();
// ============================================================
// TODO 3:
// Loop through the Vehicle[] array and:
// • Call v.basicInfo();
// • Print a blank line after each.
//
// Purpose:
// Demonstrate that all subclasses share the same Vehicle
// behavior and can call inherited methods.
// ============================================================
if (input == 1) {
for (Vehicle V : vehicles) {
V.basicInfo();
System.out.println("---------------------------------------");
}
} else if (input == 2) {
for (Vehicle V : vehicles) {
// ============================================================
// TODO 4:
// Use VehicleInspector to inspect each vehicle:
//
// VehicleInspector.inspect(v);
//
// Purpose:
// • Demonstrate the use of `instanceof`
// • Show subclassspecific inspection messages
// ============================================================
V.showDetails();
System.out.println("---------------------------------------");
}
} else if (input == 3) {
for (Vehicle V : vehicles) {
VehicleInspector.inspect(V);
System.out.println("---------------------------------------");
}
}
else if (input == 4) {
for (Serviceable s : serviceable) {
Vehicle v = (Vehicle) s;
if (s.needsService(v)) {
System.out.println(v.getBrand() + " " + v.getModel() + " needs service.");
s.performService();
} else {
System.out.println(v.getBrand() + " " + v.getModel() + " does not need service.");
}
System.out.println("---------------------------------------");
}
// ============================================================
// TODO 5:
// Create an array of Serviceable:
// Serviceable[] serviceables = { ... };
//
// This demonstrates **interfacebased polymorphism**.
// Every Car subtype implements Serviceable.
//
// IMPORTANT:
// • You must cast to Vehicle when needed:
// Vehicle v = (Vehicle) s;
//
// ============================================================
}
else if (input == 5) {
System.out.println(" ====== add mileage ====== ");
System.out.println("choose a car: (its brand)");
scanner.nextLine();
String myCar = scanner.nextLine();
System.out.println("Enter the distance: ");
double D = scanner.nextDouble();
if (Objects.equals(myCar, "tesla")) {
tesla.addMileage(D);
// ============================================================
// TODO 6:
// Loop through the Serviceable[] array:
//
// Steps inside loop:
//
// 1. Cast the current object to Vehicle:
// Vehicle v = (Vehicle) s;
//
// 2. Check:
// if (s.needsService(v)) { ... }
//
// 3. If true:
// - Print a message showing brand + model
// - Call s.performService();
//
// 4. Otherwise:
// - Print that the car does not need service
//
// Add blank lines between each item for readability.
// ============================================================
} else if (Objects.equals(myCar, "Toyota")) {
Toyota.addMileage(D);
} else if (Objects.equals(myCar, "Dodge")) {
DodgeDemon.addMileage(D);
} else if (Objects.equals(myCar, "Lamborghini")) {
Lamborghini.addMileage(D);
} else {
System.out.println("invalid name for a car");
}
} else if (input == 6) {
System.out.println(" ====== refuel ====== ");
System.out.println("choose a car: (its brand)");
scanner.nextLine();
String myCar = scanner.nextLine();
// ============================================================
// TODO 7 (Optional):
// After everything is done, print a final message:
//
// System.out.println("=== Workshop Completed ===");
//
// ============================================================
System.out.println("Enter the amount of fuel: ");
double D = scanner.nextDouble();
if (Objects.equals(myCar, "tesla")) {
tesla.charge(D);
} else if (Objects.equals(myCar, "Toyota")) {
Toyota.refuel(D);
} else if (Objects.equals(myCar, "Dodge")) {
DodgeDemon.refuel(D);
} else if (Objects.equals(myCar, "Lamborghini")) {
System.out.println("choose one: 1.gasoline or 2.electric");
int n = scanner.nextInt();
if (n == 1)
Lamborghini.refuel(D);
else if (n == 2)
Lamborghini.charge(D);
} else {
System.out.println("invalid name for a car");
}
} else if (input == 7) {
break;
}
}
System.out.println("=== Workshop Completed ===");
}
+30
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@@ -19,14 +19,32 @@ public abstract class Car extends Vehicle implements Serviceable {
double mileage, int seats) {
// TODO: Call super constructor
super(brand, model, year, mileage);
this.seats = seats;
}
public int getSeats() {
return seats;
}
// TODO: Override getEnergyType() → return "Unknown"
@Override
public String getEnergyType() {
return "Unknown";
}
// TODO: Override showDetails()
// Print brand, model, year, mileage, and number of seats
@Override
public void showDetails() {
System.out.println(getYear() + " " + getBrand() + " " + getModel() +
" | mileage: " + getMileage() +
" | seats: " + getSeats());
}
/*
* Implement Serviceable methods:
*
@@ -38,4 +56,16 @@ public abstract class Car extends Vehicle implements Serviceable {
* performService():
* - Print: "General car service completed"
*/
@Override
public boolean needsService(Vehicle v) {
return v.getMileage() > 10000;
}
@Override
public void performService() {
System.out.println("General car service completed");
}
}
+42
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@@ -29,11 +29,53 @@ public class ElectricCar extends Car implements Chargeable {
// TODO: Override getEnergyType() → return "Electric"
@Override
public String getEnergyType() {
return "Electric";
}
// TODO: Override showDetails()
// Call super.showDetails()
// Print battery capacity and charge level
@Override
public void showDetails() {
super.showDetails();
System.out.println(" | battery capacity: " + batteryCapacity + " | charge level: " + chargeLevel);
}
// TODO: Implement charge(double amount)
// Validate negative
// Cap at 100
public void charge(double amount) {
if (amount < 0)
System.out.println("This amount is unacceptable.");
else {
chargeLevel += amount;
if (chargeLevel >= 100) {
chargeLevel = 100;
System.out.println("Battery fully charged.");
}
else
System.out.println("charge level increased.");
}
}
@Override
public boolean needsService(Vehicle v) {
return super.needsService(v);
}
@Override
public void performService() {
super.performService();
System.out.println("Battery system checked");
this.chargeLevel = 100;
}
}
+44
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@@ -29,11 +29,55 @@ public class GasCar extends Car implements Refuelable {
// TODO: Override getEnergyType() → return fuelType + " (Gas)"
@Override
public String getEnergyType() {
return fuelType + " (gas)";
}
// TODO: Implement refuel(double amount)
// Validate amount
// Cap at 100
@Override
public void refuel(double amount) {
if (amount < 0)
System.out.println("This amount is unacceptable.");
if (fuelLevel == 100)
System.out.println("fuel level is already 100%.");
else {
fuelLevel += amount;
if (fuelLevel >= 100) {
fuelLevel = 100;
System.out.println("fuel level reached 100%.");
} else
System.out.println("fuel level increased.");
}
}
// TODO: Override showDetails()
// Call super.showDetails()
// Print fuel level and fuel type
@Override
public void showDetails() {
super.showDetails();
System.out.println(" | fuelLevel: " + fuelLevel + " | fuel type: " + fuelType);
}
@Override
public boolean needsService(Vehicle v) {
return super.needsService(v);
}
@Override
public void performService() {
super.performService();
System.out.println("engine and oil checked");
this.fuelLevel = 100;
}
}
+75
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@@ -0,0 +1,75 @@
package org.model;
import org.behavior.Chargeable;
import org.behavior.Refuelable;
public class HybridCar extends Car implements Refuelable, Chargeable {
private double fuelLevel;
private double chargeLevel;
public HybridCar(String brand, String model, int year, double mileage, int seats, double fuelLevel, double chargeLevel) {
super(brand, model, year, mileage, seats);
this.fuelLevel = fuelLevel;
this.chargeLevel = chargeLevel;
}
@Override
public String getEnergyType() {
return "Hybrid (Gas + Gasoline)";
}
@Override
public void showDetails() {
super.showDetails();
System.out.println(" | fuel level: " + fuelLevel + " | charge level: " + chargeLevel);
}
@Override
public void refuel(double amount) {
if (amount < 0)
System.out.println("This amount is unacceptable.");
if (fuelLevel == 100)
System.out.println("fuel level is already 100%.");
else {
fuelLevel += amount;
if (fuelLevel >= 100) {
fuelLevel = 100;
System.out.println("fuel level reached 100%.");
} else
System.out.println("fuel level increased.");
}
}
@Override
public void charge(double amount) {
if (amount < 0)
System.out.println("This amount is unacceptable.");
else {
chargeLevel += amount;
if (chargeLevel >= 100) {
chargeLevel = 100;
System.out.println("Battery fully charged.");
}
else
System.out.println("charge level increased.");
}
}
@Override
public boolean needsService(Vehicle v) {
return super.needsService(v);
}
@Override
public void performService() {
super.performService();
System.out.println("Engine oil changed and battery system checked");
this.fuelLevel = 100;
this.chargeLevel = 100;
}
}
+20
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@@ -11,6 +11,7 @@ package org.model;
public class SportsCar extends GasCar {
private double zeroToHundred;
public SportsCar(String brand, String model, int year,
@@ -27,4 +28,23 @@ public class SportsCar extends GasCar {
// TODO: Override showDetails()
// Call super.showDetails()
// Print acceleration time
@Override
public void showDetails() {
super.showDetails();
System.out.println("acceleration time: " + zeroToHundred);
}
@Override
public boolean needsService(Vehicle v) {
return super.needsService(v);
}
@Override
public void performService() {
super.performService();
System.out.println("brakes and performance checked");
}
}
+28
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@@ -22,10 +22,37 @@ public abstract class Vehicle {
// TODO: Create getters for all fields
public String getBrand() {
return brand;
}
public String getModel() {
return model;
}
public int getYear() {
return year;
}
public double getMileage() {
return mileage;
}
// TODO: Implement addMileage(double km)
// If km is negative → print error
// Otherwise increase mileage
public void addMileage(double km) {
if (km < 0)
System.out.println("This amount is not acceptable.");
else {
mileage += km;
System.out.println("mileage increased");
}
}
// TODO: Declare abstract method getEnergyType()
public void basicInfo() {
@@ -37,4 +64,5 @@ public abstract class Vehicle {
}
public abstract void showDetails();
public abstract String getEnergyType();
}
+17 -1
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@@ -1,7 +1,7 @@
package org.util;
import org.*;
import org.model.Vehicle;
import org.model.*;
/*
* Utility class to inspect vehicles.
@@ -18,5 +18,21 @@ public class VehicleInspector {
// If ElectricCar → print "Check battery system"
// If SportsCar → print "Check brakes and performance"
// If GasCar → print "Check engine and oil"
if (v instanceof ElectricCar) {
System.out.println("Check battery system");
}
else if (v instanceof SportsCar) {
System.out.println("check brakes and performance");
}
else if (v instanceof GasCar) {
System.out.println("Check engine and oil");
} else if (v instanceof HybridCar) {
System.out.println("check engine oil and battery system");
}
}
}