Method Overriding, Constructor Overloading, Scanner class

//Program for Method Overriding
class Bank
{
    int rate_of_interest()
    {
        return 0;
    }
}

class SBI extends Bank
{
    //override
    int rate_of_interest()
    {
        return 8;
    }
}

class ICICI extends Bank
{
    //override
    int rate_of_interest()
    {
        return 7;
    }
}

class AXIS extends Bank
{
    //override
    int rate_of_interest()
    {
        return 9;
    }
}

public class Method_Overriding
{
    public static void main(String soham[])
    {
        SBI sbi = new SBI();

        ICICI icici = new ICICI();

        AXIS axis = new AXIS();
          
        System.out.print("\nSBI Rate of Interest: " + sbi.rate_of_interest());

        System.out.print("\nICICI Rate of Interest: " + icici.rate_of_interest());

        System.out.print("\nAXIS Rate of Interest: " + axis.rate_of_interest());

        System.out.println();
    }
}

Output

//Program for Constructor Overloading
class Cube
{
    int length;
    int breadth;
    int height;

    Cube()                                                            //constructor 1        
    {
        length = 10;
        breadth = 10;
        height = 10;
    }

    Cube(int length, int breadth, int height)   //constructor 2
    {
        this.length = length;
        this.breadth = breadth;
        this.height = height;
    }

    public int get_volume()
    {
        return (length * breadth * height);
    }
 }

public class Constructor_Demo
{
    public static void main(String soham[]) throws Exception
    {
         Cube cube_obj1 = new Cube();
         Cube cube_obj2 = new Cube(10, 20, 30);
        System.out.println("Volume of Cube1 is : " + cube_obj1.get_volume());
        System.out.println("Volume of Cube1 is : " + cube_obj2.get_volume());
    }
}

Output

//Program for Scanner Class
import java.util.Scanner;
public class Scanner_Demo
{
   public static void main(String soham[]) throws Exception
  {
      Scanner sc = new Scanner(System.in);
  
      System.out.print("\nEnter your rollno: ");
       int rollno = sc.nextInt();

      System.out.print("\nEnter your name: ");
      String name = sc.next();

      System.out.print("\nEnter your fee: ");
      double fee = sc.nextDouble();

      System.out.print("\nStudents Details Are: ");
      System.out.print("\nRoll no: "+rollno);
      System.out.print("\nName: "+name);
      System.out.print("\nFee: "+fee);

       System.out.println();
   }
}

Output