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BAEL-6079 Code examples from article (#13486) 

* BAEL-6079 Code examples from article

* BAEL-6079 Code examples from article

* BAEL-6079 Code examples from article update

* BAEL-6079 Code examples from article update
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Bogdan Cardoş 2023-04-26 09:30:27 +03:00 committed by GitHub
parent 6cc24e0759
commit c8cd042d64
5 changed files with 261 additions and 0 deletions
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98
core-java-modules/core-java-lang-oop-methods/src/main/java/com/baeldung/methods/Car.java Normal file
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package com.baeldung.methods;
public class Car {
private final String make;
private final String model;
private final int year;
private final String color;
private final boolean automatic;
private final int numDoors;
private final String features;
private Car(CarBuilder carBuilder) {
this.make = carBuilder.make;
this.model = carBuilder.model;
this.year = carBuilder.year;
this.color = carBuilder.color;
this.automatic = carBuilder.automatic;
this.numDoors = carBuilder.numDoors;
this.features = carBuilder.features;
}
public String getMake() {
return make;
}
public String getModel() {
return model;
}
public int getYear() {
return year;
}
public String getColor() {
return color;
}
public boolean isAutomatic() {
return automatic;
}
public int getNumDoors() {
return numDoors;
}
public String getFeatures() {
return features;
}
public static class CarBuilder {
private final String make;
private final String model;
private final int year;
private String color = "unknown";
private boolean automatic = false;
private int numDoors = 4;
private String features = "";
public CarBuilder(String make, String model, int year) {
this.make = make;
this.model = model;
this.year = year;
}
public CarBuilder color(String color) {
this.color = color;
return this;
}
public CarBuilder automatic(boolean automatic) {
this.automatic = automatic;
return this;
}
public CarBuilder numDoors(int numDoors) {
this.numDoors = numDoors;
return this;
}
public CarBuilder features(String features) {
this.features = features;
return this;
}
public Car build() {
return new Car(this);
}
}
@Override
public String toString() {
return "Car [make=" + make + ", model=" + model + ", year=" + year + ", color=" + color + ", automatic=" + automatic + ", numDoors=" + numDoors + ", features=" + features + "]";
}
}

52
core-java-modules/core-java-lang-oop-methods/src/main/java/com/baeldung/methods/Motorcycle.java Normal file
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package com.baeldung.methods;
import java.io.Serializable;
public class Motorcycle extends Vehicle implements Serializable {
private static final long serialVersionUID = 5973661295933599929L;
private int year;
private String features = "";
public Motorcycle() {
super();
}
public Motorcycle(String make, String model, String color, int weight, boolean statusNew, int year) {
super(make, model, color, weight, statusNew);
this.year = year;
}
public Motorcycle(Vehicle vehicle, int year) {
super(vehicle);
this.year = year;
}
public int getYear() {
return year;
}
public void setYear(int year) {
this.year = year;
}
public void setFeatures(String features) {
this.features = features;
}
public String getFeatures() {
return features;
}
public void addMotorcycleFeatures(String... features) {
StringBuilder str = new StringBuilder(this.getFeatures());
for (String feature : features) {
if (!str.toString().isEmpty())
str.append(", ");
str.append(feature);
}
this.setFeatures(str.toString());
}
}

33
core-java-modules/core-java-lang-oop-methods/src/main/java/com/baeldung/methods/Vehicle.java Normal file
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package com.baeldung.methods;
public class Vehicle {
static String defaultValue = "DEFAULT";
private String make = defaultValue;
private String model = defaultValue;
private String color = defaultValue;
private int weight = 0;
private boolean statusNew = true;
public Vehicle() {
super();
}
public Vehicle(String make, String model, String color, int weight, boolean statusNew) {
this.make = make;
this.model = model;
this.color = color;
this.weight = weight;
this.statusNew = statusNew;
}
public Vehicle(Vehicle vehicle) {
this(vehicle.make, vehicle.model, vehicle.color, vehicle.weight, vehicle.statusNew);
}
@Override
public String toString() {
return "Vehicle [make=" + make + ", model=" + model + ", color=" + color + ", weight=" + weight + ", statusNew=" + statusNew + "]";
}
}

20
core-java-modules/core-java-lang-oop-methods/src/main/java/com/baeldung/methods/VehicleProcessor.java Normal file
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package com.baeldung.methods;
public class VehicleProcessor {
Vehicle processVehicle(String make, String model, String color, int weight, boolean status) {
return new Vehicle(make, model, color, weight, status);
}
Vehicle processVehicle(Vehicle vehicle) {
return new Vehicle(vehicle);
}
Car processCar(Car car) {
return new Car.CarBuilder(car.getMake(), car.getModel(), car.getYear()).color(car.getColor())
.automatic(car.isAutomatic())
.features(car.getFeatures())
.build();
}
}

58
core-java-modules/core-java-lang-oop-methods/src/test/java/com/baeldung/methods/VehicleProcessorUnitTest.java Normal file
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package com.baeldung.methods;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.jupiter.api.Test;
class VehicleProcessorUnitTest {
VehicleProcessor vehicleProcessor = new VehicleProcessor();
Vehicle vehicle = new Vehicle("Ford", "Focus", "red", 2200, true);
@Test
void givenAllArguments_whenMethodCall_thenVerifyCallIsDoneCorrectly() {
Vehicle veh = vehicleProcessor.processVehicle("Ford", "Focus", "red", 2200, true);
assertThat(veh.toString()).hasToString(vehicle.toString());
}
@Test
void givenParameterObject_whenMethodCall_thenVerifyCallIsDoneCorrectly() {
Vehicle veh = vehicleProcessor.processVehicle(vehicle);
assertThat(veh.toString()).hasToString(vehicle.toString());
}
@Test
void givenJavaBeanPattern_whenMethodCall_thenVerifyCallIsDoneCorrectly() {
Motorcycle motorcycle = new Motorcycle("Ducati", "Monster", "yellow", 235, true, 2023);
motorcycle.setFeatures("GPS");
vehicleProcessor.processVehicle(motorcycle);
assertThat(motorcycle.getFeatures()).isEqualToIgnoringCase("GPS");
}
@Test
void givenJavaVarargs_whenMethodCall_thenAssertTheReturnedConcatenatedString() {
Motorcycle motorcycle = new Motorcycle("Ducati", "Monster", "red", 350, true, 2023);
motorcycle.addMotorcycleFeatures("abs");
assertThat(motorcycle.getFeatures()).isEqualToIgnoringCase("abs");
motorcycle.addMotorcycleFeatures("navi", "charger");
assertThat(motorcycle.getFeatures()).isEqualToIgnoringCase("abs, navi, charger");
motorcycle.addMotorcycleFeatures("wifi", "phone", "satellite");
assertThat(motorcycle.getFeatures()).isEqualToIgnoringCase("abs, navi, charger, wifi, phone, satellite");
}
@Test
void givenJavaBuilderPattern_whenMethodCall_thenVerifyCallIsDoneCorrectly() {
Car car = new Car.CarBuilder("Ford", "Focus", 2023).color("blue")
.automatic(true)
.features("abs, navi, charger, wifi, phone, satellite")
.build();
Car result = vehicleProcessor.processCar(car);
assertThat(result.toString()).hasToString(car.toString());
}
}