odd output for an Account app in java

Question

so i have an assignment for a java programming II class that requires me to create a class called Account that is to do the following:

Design a class named Account that contains:

Data Members:

A private data filed of type int named id for the account;

A private data field of type double named balance for the account;

A private data field of type double named annualInterestRate that stores the current interest rate (assume all accounts have the same interest rate);

A private data field of type Date named dateCreated that stores the date when the account was created;

Methods A no-arg constructor that creates a default account and sets the following data members to 0 (zero): id, balance, and annualInterestRate;

A constructor that creates an account with the specified id and initial balance;

The accessor and mutator methods for id, balance and annualInterestRate;

The accessor method for dateCreated

A method named getMonthlyInterestRate( ) that returns the monthly interest rate;

A method named getMonthlyInterest( ) that returns the monthly interest;

A method named withdraw that withdraws a specified amount from the account;

A method named deposit that deposits a specified amount into the account.

Write a test program that creates an Account object with an account ID of 1122, a balance of $20,000, and an annual interest rate of 4.5%. Use the withdraw method to withdraw $2,500, use the deposit method to deposit $3,000, and print the balance, the monthly interest, and the date when this account was created.

the tester app has been given to us by the professor, which i will link down below. all that is required is to create the Account class, which i have. everything compiles correctly, however when i run the tester app the output i get is very odd :

----jGRASP exec: java AccountTest


Current account values: 
Account@208e2fb5

Current account values: 
Account@208e2fb5

Current account values: 
Account@208e2fb5

im at a loss right now, i have no idea what to do or where to go from here.

Tester App:

public class AccountTest
{
   public static void main(String [] args)
   {

      Account a = new Account(1122, 20000.00);
      a.setAnnualInterestRate(4.5);

     System.out.println("\nCurrent account values: \n" + a);

      a.withdraw(2500.00);
      System.out.println("\nCurrent account values: \n" + a);

      a.deposit(3000.00);
      System.out.println("\nCurrent account values: \n" + a);
   }
}

Account Class i created:

import java.util.Date;
public class Account
{
   private int id;
   private double balance;
   private double annualInterestRate;
   private Date date = new Date();


   Account()
   {
      id = 0;
      balance = 0.0;
      annualInterestRate = 0.0;
   }

   Account(int newId, double bal)
   {
      id = newId;
      balance = bal;
   }

   public void setId(int newId)
   {
      id = newId;
   }

   public void setBalance( double bal)
   {
      balance = bal;
   }

   public void setAnnualInterestRate(double annualRate)
   {
      annualInterestRate = annualRate;
   }       

   public int getId()
   { 
      return id;
   }

   public double getBalance()
   {
      return balance;
   }

   public double getAnnualInterestRate()
   {
      return annualInterestRate;
   }         


   /*public void setDate(Date n)
   {
      dateCreated = n;
   }*/

   public java.util.Date getDate()
   {
      return date;
   }   

   double getMonthlyInterestRate()
   {
      return annualInterestRate/12;
   }

   double withdraw(double amount)
   {
      return balance -= amount;
   }

   double deposit(double amount)
   {
      return balance += amount;
   }    
}

apologies in advanced for my formatting.

Tomas Bisciak Tomas Bisciak · Accepted Answer · 2014-07-28T00:05:30

You are printing string representation of object.You cant expect for java to know on its own what you want to have printed.

I recommend you override toString method in your object Account that prints detail/values of fields of current object.

You can check how to override toString method here

Bud if you just want to print one value for instance

  System.out.println("\nCurrent account interest rate :" +  a.getAnnualInterestRate());

Update to your comment.-:

 @Override
    public String toString() {
        return String.format("Here is detail of my object name : %s value : %d",stringValue,doubleValue);
    }

odd output for an Account app in java

1 Answers