help! test code provided by teacher is attached along with the starting code

import java.util.*;
import java.io.*;
/**
 * A bank account has a balance and a mechanism for applying interest or fees at
 * the end of the month. TODO: Implement the Formattable interface
 */
public class BankAccount
{
    private double balance;

    /**
     * Constructs a bank account with zero balance.
     */
    public BankAccount()
    {
        balance = 0;
    }

    /**
     * Constructs a bank account with a given balance.
     */
    public BankAccount(double amount)
    {
        balance = amount;
    }
    
    /**
     * Makes a deposit into this account.
     *
     * @param amount the amount of the deposit
     */
    public void deposit(double amount)
    {
        balance = balance + amount;

help! test code provided by teacher is attached along with the starting code

    }

    /**
     * Makes a withdrawal from this account.
     *
     * @param amount the amount of the withdrawal
     */
    public void withdraw(double amount)
    {
        balance = balance - amount;
    }

 
    /**
     * Gets the current balance of this bank account.
     *
     * @return the current balance
     */
    public double getBalance()
    {
        return balance;
    }

    //TODO: Your work goes here
    

    /**
     * Some quick self-tests to see if you've done the
     * formatting correctly.
     * @param args
     */
    public static void main(String[] args)
    {
       BankAccount account1 = new BankAccount(1000);
       BankAccount account2 = new BankAccount(55);
       BankAccount account3 = new BankAccount(345);
       BankAccount account4 = new BankAccount(99000);

       System.out.printf( "Actual  : |%10s|%10s|%10s|%10s|%n", account1, account2, account3, account4);
       System.out.println("Expected: |    1000.0|      55.0|     345.0|   99000.0|");
    }
    
}

Attachments:

• 1509974754-2017-08-01 2.png