Java Programming In the following class diagram, Account is already defined. Now

Question

Java Programming

In the following class diagram, Account is already defined. Now define SavingAccount.java in which:

• the constructor uses four passed-in parameters to update values of all instance variables.

• toString() returns a String for all instance variable values of an SavingAccount object.

A sample return value of toString() for an SavingAccount object is as follows. The interest rate has three decimal places.

Customer ID: 4838156 Name: John Smith Account Number:

5820389 Balance: $5,280.05Interest Rate: 2.750%

Account accountNo: int customer: Customer balance: double Account(int, Customer, double) getAccountNo0: int set AccountNo(int) getCustomero: Customer setCustomer (Customer) getBalance double 0: setBalance(double) deposit double) withdraw(double): bookean toString String O: SavingAccount interest Rate: double SavingAccount (int, Customer, double, double) get InterestRateo: double setInterestRate(double) toStringo: String

Explanation / Answer

Customer.java

package accounts;

public class Customer {

   private int custId;
   private String custName;
  
   public Customer(int no,String nm){
       custId=no;
       custName=nm;
   }
  
   public String toString(){
       return "CustomerID: "+custId+" "
               + "Name: "+custName;
   }
}

Account.java

package accounts;

public class Account {

   private int accountNo;
   private double balance;
   private Customer customer;
  
   public Account(int acc,Customer cust,double bal){
       accountNo=acc;
       customer=cust;
       balance=bal;
   }

   public int getAccountNo() {
       return accountNo;
   }

   public void setAccountNo(int accountNo) {
       this.accountNo = accountNo;
   }

   public double getBalance() {
       return balance;
   }

   public void setBalance(double balance) {
       this.balance = balance;
   }

   public Customer getCustomer() {
       return customer;
   }

   public void setCustomer(Customer customer) {
       this.customer = customer;
   }
  
  
   public void withdraw(double amt){
       balance=balance-amt;
   }
  
   public void deposite(double amt){
       balance=balance+amt;
   }
  
   public String toString(){
      
       return customer.toString()+" "
               + "Account Number: "+accountNo+" "
                       + "Balance: "+balance;
   }
}

SavingAccount.java

package accounts;

public class SavingAccount extends Account {

   private double interestRate;
  
   public SavingAccount(int acc,Customer cust,double balance,double intr){
       super(acc,cust,balance);
       interestRate=intr;
   }

   public double getInterestRate() {
       return interestRate;
   }

   public void setInterestRate(double interestRate) {
       this.interestRate = interestRate;
   }
  
   public String toString(){
       return super.toString()+" "
               + "Interest Rate: "+interestRate+"%";
   }
}

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