LAB 3.4: Aggregation vs Composition PROGRAM 4 // Java Program to Illustrate Difference between Aggregation and Composition // Class 1 // Engine class which will be used by car // and Car class will have a field/attribute of Engine type. class Engine { // Method to starting an engine public void work () { System.out.println("Engine of car has been started "); } } // Class 2 // Engine class class Car ( // Composition private Engine engine; // Constructor Car (Engine engine) { this.engine engine; } public void move () { // Class 3 // Main class engine.work(); System.out.println("Car is moving "); } } public class Main( public static void main(String[] args) { // Making an engine by creating // an instance of Engine class. Engine engine new Engine(); // Making a car with engine // passing a engine instance as an argument // while creating instance of Car Car car // Making car to move //by calling move () method inside main() car.move(); }} new Car (engine); 1. Compile and run the program to get the output. Explain the output. 2. Draw the UML class diagram relationships for the program.
LAB 3.4: Aggregation vs Composition PROGRAM 4 // Java Program to Illustrate Difference between Aggregation and Composition // Class 1 // Engine class which will be used by car // and Car class will have a field/attribute of Engine type. class Engine { // Method to starting an engine public void work () { System.out.println("Engine of car has been started "); } } // Class 2 // Engine class class Car ( // Composition private Engine engine; // Constructor Car (Engine engine) { this.engine engine; } public void move () { // Class 3 // Main class engine.work(); System.out.println("Car is moving "); } } public class Main( public static void main(String[] args) { // Making an engine by creating // an instance of Engine class. Engine engine new Engine(); // Making a car with engine // passing a engine instance as an argument // while creating instance of Car Car car // Making car to move //by calling move () method inside main() car.move(); }} new Car (engine); 1. Compile and run the program to get the output. Explain the output. 2. Draw the UML class diagram relationships for the program.
Computer Networking: A Top-Down Approach (7th Edition)
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![LAB 3.4: Aggregation vs Composition
PROGRAM 4
// Java Program to Illustrate Difference between Aggregation and
Composition
// Class 1
// Engine class which will be used by car
// and Car class will have a field/attribute of Engine type.
class Engine {
// Method to starting an engine
public void work () {
System.out.println("Engine of car has been started ");
}
}
// Class 2 //
Engine class
class Car (
// Composition
private Engine engine;
// Constructor
Car (Engine engine) {
this.engine - engine; }
public void move () {
engine.work();
System.out.println("Car is moving "); } }
// Class 3 // Main
class
public class Main(
public static void main(String[] args) {
// Making an engine by creating
// an instance of Engine class.
Engine engine new Engine();
// Making a car with engine
// passing a engine instance as an argument
// while creating instance of Car
Car car
new Car (engine);
// Making car to move
//by calling move () method inside main()
car.move(); } }
1. Compile and run the program to get the output. Explain the output.
2. Draw the UML class diagram relationships for the
program.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0821a61d-ab18-48f9-8506-a163d0a796bf%2Fe1724a51-936a-431d-a459-e62f292703ad%2Fiaemgde_processed.jpeg&w=3840&q=75)
Transcribed Image Text:LAB 3.4: Aggregation vs Composition
PROGRAM 4
// Java Program to Illustrate Difference between Aggregation and
Composition
// Class 1
// Engine class which will be used by car
// and Car class will have a field/attribute of Engine type.
class Engine {
// Method to starting an engine
public void work () {
System.out.println("Engine of car has been started ");
}
}
// Class 2 //
Engine class
class Car (
// Composition
private Engine engine;
// Constructor
Car (Engine engine) {
this.engine - engine; }
public void move () {
engine.work();
System.out.println("Car is moving "); } }
// Class 3 // Main
class
public class Main(
public static void main(String[] args) {
// Making an engine by creating
// an instance of Engine class.
Engine engine new Engine();
// Making a car with engine
// passing a engine instance as an argument
// while creating instance of Car
Car car
new Car (engine);
// Making car to move
//by calling move () method inside main()
car.move(); } }
1. Compile and run the program to get the output. Explain the output.
2. Draw the UML class diagram relationships for the
program.
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