Class and Objects Programs

import java.util.Scanner;

class Rectangle {

    int length;
    int breadth;

    void getData() {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter length: ");
        length = sc.nextInt();
        System.out.print("Enter breadth: ");
        breadth = sc.nextInt();
        sc.close();
    }

    void displayArea() {
        int area = length * breadth;
        System.out.println("Area of Rectangle: " + area);
    }
}

public class RectangleClass {
    public static void main(String[] args) {
        Rectangle rect = new Rectangle();
        rect.getData();
        rect.displayArea();
    }
}

import java.util.Scanner;

class Account {
    private String accountHolder;
    private int accountId;
    private int ammount;
    private String address;
    
    Account() {
        accountHolder = "";
        accountId = 0;
        ammount = 0;
        address = "";
    }
    
    Account(String aH, int aId, int am, String ad) {
        accountHolder = aH;
        accountId = aId;
        ammount = am;
        address = ad;
    }
    
    public void Deposit() {
        Scanner sc = new Scanner(System.in);
        
        System.out.print("Enter Ammount to be Deposited:  ");
        int d_amount = sc.nextInt();
        
        ammount = ammount + d_amount;
        
        System.out.println(d_amount+" is Deposited to your account");
        sc.close();
    }
    
    public void Get_Balance() {
        System.out.println("<-- Account Details -->");
        System.out.println("Name: "+accountHolder);
        System.out.println("Balance: "+ammount);
        System.out.println("Address: "+ address);
    }
    
    public void Withdraw() {
        Scanner sc = new Scanner(System.in);
        
        System.out.print("Enter Ammount to be Withdrawn:  ");
        int w_amount = sc.nextInt();
        
        ammount = ammount - w_amount;
        
        System.out.println(w_amount+" is Withdrawn from your account");
        sc.close();
    }
}

public class BasicAccountSetup {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
	
		System.out.println("<-- Enter Details -->");
		System.out.print("Enter Name: ");
		String name = sc.nextLine();
		System.out.print("Enter Initial Ammount: ");
		int initialAmmount = sc.nextInt();
		sc.nextLine();
		System.out.print("Enter Address: ");
		String address = sc.nextLine();
		
		Account a1 = new Account(name, 12345, initialAmmount, address);
	
		while(true) {
		    System.out.println("You Got the choices --->");
		    System.out.println("1. GetBaance");
		    System.out.println("2. Deposit");
		    System.out.println("3. Withdraw");
		    System.out.println("4. Exit");
		    System.out.print("Select: ");
		    int choice = sc.nextInt();
		
		    switch(choice) {
		        case 1: 
		            a1.Get_Balance();
		            break;
		        
		        case 2: 
		            a1.Deposit();
		            break;
		        
		        case 3: 
		            a1.Withdraw();
		            break;
		        
		        case 4: 
		            System.out.println("Exiting....");
    		        System.exit(0);
		        
		        default : 
		            System.out.println("Invalid Choice");
		    }

			sc.close();
	    }	
	}
}
 

class Distance {
    private int feet;
    private float inches;

    public Distance(int feet, float inches) {
        this.feet = feet;
        this.inches = inches;
    }

    public Distance add(Distance d) {
        int totalFeet = this.feet + d.feet;
        float totalInches = this.inches + d.inches;

        if (totalInches >= 12) {
            totalFeet += (int)(totalInches / 12);
            totalInches = totalInches % 12;
        }

        return new Distance(totalFeet, totalInches);
    }

    public int compare(Distance d) {
        float thisTotalInches = this.feet * 12 + this.inches;
        float dTotalInches = d.feet * 12 + d.inches;

        if (thisTotalInches > dTotalInches) {
            return 1; 
        } else if (thisTotalInches < dTotalInches) {
            return -1; 
        } else {
            return 0; 
        }
    }

    public void display() {
        System.out.println(feet + " feet " + inches + " inches");
    }
}

public class DistanceComparing {
    public static void main(String[] args) {
        Distance d1 = new Distance(5, 8.5f);
        Distance d2 = new Distance(3, 11.75f);

        Distance sum = d1.add(d2);

        System.out.print("Distance 1: ");
        d1.display();

        System.out.print("Distance 2: ");
        d2.display();

        System.out.print("Sum of distances: ");
        sum.display();

        int comparison = d1.compare(d2);
        if (comparison > 0) {
            System.out.println("Distance 1 is greater than Distance 2.");
        } else if (comparison < 0) {
            System.out.println("Distance 1 is smaller than Distance 2.");
        } else {
            System.out.println("Distance 1 is equal to Distance 2.");
        }
    }
}

class Cylinder {
    private double radius;
    private double height;
    
    public void setDimensions(double r, double h) {
        radius = r;
        height = h;
    }

    public double calculateVolume() {
        return Math.PI * radius * radius * height;
    }

    public void displayDetails() {
        System.out.println("Radius: " + radius);
        System.out.println("Height: " + height);
        System.out.println("Volume: " + calculateVolume());
    }
}

public class CylinderClass {
    public static void main(String[] args) {
        Cylinder cylinder1 = new Cylinder();
        cylinder1.setDimensions(3.0, 5.0);

        Cylinder cylinder2 = new Cylinder();
        cylinder2.setDimensions(4.5, 7.2);

        System.out.println("Cylinder 1 details:");
        cylinder1.displayDetails();

        System.out.println("Cylinder 2 details:");
        cylinder2.displayDetails();
    }
}