Question

In java

Create a program to calculate interest rate and total balance - the program consists of

(a) A class that encapsulates the interest rate and total balance calculation

• Constructor should accept initial balance and interest rate
• Methods:
  • Returns interest rate
  • Returns total balance
  • Set interest rate
  • Set initial balance

(b) A test program that uses class from step (A) to perform the following:

• Set interest rate to 5% and initial balance to 1000
• Print interest amount and total balance
• Increase interest rate to 10%
• Print interest amount and total balance
• Increase initial balance to 2000
• Print interest amount and total balance

Answer 1

//Java program

class Account{
   private double Balance;
   private double interest_rate;
  
   public Account(double bal,double interest) {
       Balance = bal;
       interest_rate = interest;
   }
  
   public void setBalance(double balance) {
       Balance = balance;
   }
   public double getBalance() {
       return Balance;
   }
   public void setInterestRate(double interest) {
       interest_rate = interest;
   }
   public double getInterestRate() {
       return interest_rate;
   }
}

public class Main {
   public static void main(String args[]) {
       Account acc = new Account(1000,5);
       double interest = acc.getBalance()*acc.getInterestRate()/100;
       System.out.println("Interest : "+interest);
      
       System.out.println("Total Balanace : "+(interest+acc.getBalance()));
      
       acc.setInterestRate(10);
       interest = acc.getBalance()*acc.getInterestRate()/100;
       System.out.println("Interest : "+interest);
       System.out.println("Total Balanace : "+(interest+acc.getBalance()));
      
       acc.setBalance(2000);
       interest = acc.getBalance()*acc.getInterestRate()/100;
       System.out.println("Interest : "+interest);
       System.out.println("Total Balanace : "+(interest+acc.getBalance()));
   }
}
//sample output