JavaCodes/AbstractDemo.java at main · raskarabhi45/JavaCodes · GitHub

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import java.lang.*;

abstract class RBI
{
    public int Balance;
    public RBI()
    {
        this.Balance=0;
    }

    public void Credit(int Amount)
    {
    this.Balance=this.Balance+Amount;
    }

    public void Debit(int Amount)
    {
    this.Balance=this.Balance-Amount;
    }

    public abstract int CalculateInterest();

}

class SBI extends RBI
{
   public int AccountNumber;
   public int IFSC;

   public int CalculateInterest()
   {
       return 6;
   }
}

class PNB extends RBI
{
    public int AccountNumber;
    public int IFSC;

    public int CalculateInterest()
    {
        return 7;
    }

}

class AbstractDemo
{
    public static void main(String a[])
    {
        PNB pobj=new PNB();
        SBI sobj=new SBI();

        pobj.Credit(1000);
        pobj.Debit(200);

        System.out.println(pobj.Balance); //800

    }
}