Untitled

package com.citibanamex;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;

public class Atm {
  /*
   * atm class: 2 instance attributes balance serialnumber
   *
   * 1 constructor
   *
   * encapsulate attributes
   *
   * getter and setter:
   *
   * a method that accepts deposits and adds to the balance deposit() it there
   * is a neg number it throws an exception
   *
   * a method to withdraw and subtracts from the balance withdraw() if the
   * withdraw is higher that the balance, it throws an exception
   *
   * Optional: Add a log of the deposits and withdraws with date and name
   * private ArrayList<String> log= new ArrayList<>();
   *
   *
   *
   */
  private double balance;
  private int serialNumber;
  private ArrayList<String> log;

  static private int counter;

  Atm(double balance) {
    this.balance = balance;
    this.serialNumber = counter++;
    this.log = new ArrayList<>();
  }

  public double getBalance() {
    return this.balance;
  }

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

  public double getSerialNumber() {
    return this.serialNumber;
  }

  public void setSerialNumber(int serialNumber) {
    this.serialNumber = serialNumber;
  }

  void addLog(String entryData) {
    this.log.add(entryData);
  }

  public String getLog() {
    String logs = "";
    for (String alog : this.log) {
      logs += alog + "\n";
    }
    return logs;
  }

  String getCurrentDate() {
    Date date = Calendar.getInstance().getTime();
    DateFormat dateFormat = new SimpleDateFormat("yyyy/mm/dd hh:mm:ss");
    String currentDate = dateFormat.format(date);
    return currentDate;
  }

  void deposit(double deposit) {
    if (deposit <= 0)
      throw new ArithmeticException("This deposit is not allowed");
    setBalance(getBalance() + deposit);
    addLog(stringOperation("Deposit", deposit));
  }

  void withdraw(double askedCash) {
    if (askedCash >= this.balance)
      throw new ArithmeticException("Cash asked is higher than your balance");
    setBalance(getBalance() - askedCash);
    addLog(stringOperation("Withdraw", askedCash));
  }

  String stringOperation(String opt, double amount) {
    return getCurrentDate() + " " + opt + " of $" + amount;
  }
}

package com.citibanamex;

public class AtmTest {
  public static void main(String[] args) {
    Atm atm1 = new Atm(7500.0);

    // test of deposit method
    testOfDeposit(atm1, 0.0);

    // test of withdraw method
    testOfWithdraw(atm1, 8000.0);

    // getting the log:
    atm1.deposit(1500.0);
    atm1.withdraw(300.0);
    atm1.deposit(3000.0);
    atm1.withdraw(100.0);
    System.out.println("log:\n" + atm1.getLog());
  }

  static void testOfDeposit(Atm objectAtm, double test) {
    try {
      System.out.println("Trying to make a deposit of $0.0");
      objectAtm.deposit(test);
    } catch (ArithmeticException e) {
      e.printStackTrace();
    } finally {
      System.out.println("Balance: $" + objectAtm.getBalance());
    }
  }

  static void testOfWithdraw(Atm objectAtm, double test) {
    try {
      System.out.println("Trying to withdraw $8000.00");
      objectAtm.withdraw(test);
    } catch (ArithmeticException e) {
      e.printStackTrace();
    } finally {
      System.out.println("Balance: $" + objectAtm.getBalance());
    }
  }
}