Notes

package classWork;

public abstract class Computer {

private String brand;
private String processor;
private int ram;
private int hdd;

// Constructors
public Computer() {
}

public Computer(String brand, String processor, int ram, int hdd) {
this.brand = brand;
this.processor = processor;
this.ram = ram;
this.hdd = hdd;
}

// Setters and getters
public String getBrand() {
return brand;
}

public void setBrand(String brand) {
this.brand = brand;
}

public String getProcessor() {
return processor;
}

public void setProcessor(String processor) {
this.processor = processor;
}

public int getRam() {
return ram;
}

public void setRam(int ram) {
this.ram = ram;
}

public int getHdd() {
return hdd;
}

public void setHdd(int hdd) {
this.hdd = hdd;
}

// Abstract method to be implemented by subclasses
public abstract void display();
}

package classWork;

public class Desktop extends Computer {
// Constructors

public Desktop() {
super();
}

public Desktop(String brand, String processor, int ram, int hdd) {
super(brand, processor, ram, hdd);
}

// Implementation of the abstract method
@Override
public void display() {
System.out.println("Desktop Configuration: ");
System.out.println("Brand: " + getBrand());
System.out.println("Processor: " + getProcessor());
System.out.println("RAM: " + getRam() + "GB");
System.out.println("HDD: " + getHdd() + "GB");
}
}

package classWork;

public class Laptop extends Computer {
// Constructors

public Laptop() {
super();
}

public Laptop(String brand, String processor, int ram, int hdd) {
super(brand, processor, ram, hdd);
}

// Implementation of the abstract method
@Override
public void display() {
System.out.println("Laptop Configuration: ");
System.out.println("Brand: " + getBrand());
System.out.println("Processor: " + getProcessor());
System.out.println("RAM: " + getRam() + "GB");
System.out.println("HDD: " + getHdd() + "GB");
}
}

package classWork;

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

// Create Desktop object
Desktop desktop = new Desktop();
System.out.println("Enter Desktop details:");
System.out.print("Brand: ");
desktop.setBrand(scanner.nextLine());
System.out.print("Processor: ");
desktop.setProcessor(scanner.nextLine());
System.out.print("RAM (GB): ");
desktop.setRam(scanner.nextInt());
System.out.print("HDD (GB): ");
desktop.setHdd(scanner.nextInt());
scanner.nextLine(); // Consume newline

// Create Laptop object using constructor overloading
System.out.println("nEnter Laptop details:");
System.out.print("Brand: ");
String brand = scanner.nextLine();
System.out.print("Processor: ");
String processor = scanner.nextLine();
System.out.print("RAM (GB): ");
int ram = scanner.nextInt();
System.out.print("HDD (GB): ");
int hdd = scanner.nextInt();

Laptop laptop = new Laptop(brand, processor, ram, hdd);

// Demonstrate polymorphism
System.out.println("nDisplaying configurations:");
Computer[] computers = {desktop, laptop};
for (Computer computer : computers) {
computer.display();
System.out.println();
}

scanner.close();
}
}