Continuing from Problem 2, we want to model the situation where a Person can hav

Question

Continuing from Problem 2, we want to model the situation where a Person can have many accounts (any combination of RegularAccounts and PremiumAccounts). The Person class should have an arraylist of accounts and have these methods: a. addAccount( a : Account ) – Adds the account a to the Person

b. getAccount( i : int ) : Account – Return the ith account. No error checking required.

c. getNumAccounts() : int – Returns the number of accounts.

d. getTotalBalance() : double – Returns the total balance added over all the accounts the person has.

e. applyInterest() – applies interest to every account the person has.

f. getPremiumAccounts() : ArrayList - Returns all the PremiumAccounts in an ArrayList.

g. toString() : string – Returns a string like this: Num Accounts: 3 bal = 2234.34 bal = 4523.29 bal = 45.62 Total Balance = 6803.25 Do the following: 3

a. Continue your class diagram from Problem 2 by adding the Person class and any association with the Account class. b. Write the Person class as described above. c. Write a tester, PersonTester.java and test your classes thoroughly. Use this Main method: Person p1 = new Person(); p1.addAccount(new RegularAccount(2000)); p1.addAccount(new PremiumAccount(3000)); p1.addAccount(new RegularAccount(200)); p1.addAccount(new RegularAccount(1000)); p1.addAccount(new PremiumAccount(500)); System.out.println("***Call toString() on Person after 5 accounts are added:"); System.out.println(p1); System.out.println(); System.out.println("***Call getNumAccounts(): " + p1.getNumAccounts() + " " ); System.out.println("***Call getAccount(1): " + p1.getAccount(1) + " " ); System.out.println("***Call getTotalBalance(): " + p1.getTotalBalance() + " " ); System.out.println("***Call getPremiumAccounts()"); System.out.println(" Loop over each PremiumAccount and print:"); ArrayList pAccounts = p1.getPremiumAccounts(); for( PremiumAccount pa : pAccounts ) System.out.println(pa); System.out.println(); System.out.println("***Call applyInterest(), then print Person:"); p1.applyInterest(); System.out.println(p1); The above test code should output the following: ***Call toString() on Person after 5 accounts are added: Num Accounts: 5 bal = 2000.0 bal = 3000.0 bal = 200.0 bal = 1000.0 bal = 500.0 Total Balance = 6700.0 ***Call getNumAccounts(): 5 ***Call getAccount(1): Premium Account: The balance is $3000.00 ***Call getTotalBalance(): 6700.0 ***Call getPremiumAccounts() Loop over each PremiumAccount and print: Premium Account: The balance is $3000.00 Premium Account: The balance is $500.00 4 ***Call applyInterest(), then print Person: Num Accounts: 5 bal = 2010.0 bal = 3045.0 bal = 200.0 bal = 1000.0 bal = 507.5 Total Balance = 6762.5

Explanation / Answer

Below is the Account Class:
package prob2;
public class Account {

double balance;

public void deposit(double amount) {
balance = balance + amount;
}

public void withdraw(double amount) {
balance = balance - amount;
}

public void addInterest () {
balance += (balance - 1000)*.01;
}

public double getBalance() {
return balance;
}
}

Below is the Person class:

package prob2;

import java.util.ArrayList;

public class Person {
ArrayList<Account> accounts = new ArrayList<Account>();
int accounts.size();
double sum;
double balance;

public void addAccount(Account a){
accounts.size();
accounts.add(a);
}

public Account getAccount (int i) {
return accounts.get(i);
}

public int getNumAccounts() {
return accounts.size();

}

public double getTotalBalance() {
double sum = 0;
for (Account a: accounts)
sum = sum + a.getBalance();
return sum;
}

public void applyInterest() {
for (Account a: accounts)
a.addInterest();
}
public void removeAccount(int i) {
accounts.remove(i);
accounts.size()--;
}

public void depositFunds(int i, double amount) {
getAccount(i).deposit(amount);
}

public void withdrawFunds(int i, double amount) {
getAccount(i).withdraw(amount);
}

public void clearAccounts() {
accounts.clear();
}

int count=0;
public String[] toString() {

double balance = 0;
String s[]=new String[accounts.size()];
for (Account a: accounts) {
balance = a.getBalance();
String result;
result = ""+balance;
s[count]=result; count++; }
return s;
}

public void showDetails(String[] input) {
System.out.println("Num Accounts: "+accounts.size());
String result=toString():
for(int i=0;i<result.length;i++) System.out.println("Balance :- "+result[i]);
System.out.println(" Total Balance: " + getTotalBalance());
}
}

The output should look something like this:
Num Accounts: 3

bal = 2234.34

bal = 4523.29

bal = 45.62

Total Balance = 6803.25

PersonTester.java program is given below:

package personapp;

import java.util.Scanner;

public class Validator {

int stringLength; // Variable for testing length of input strings
int loopCont2 = 0; // Variable for custEmpChoice Loop
int loopCont3 = 0; // Variable for First Name Loop
int loopCont4 = 0; // Variable for Last Name Loop
int loopCont5 = 0; // Variable for Email Loop
int loopCont6 = 0; // Variable for Customer Number Loop
int loopCont7 = 0; // Variable for Social Security Loop

public void keepGoing(){

// Create Scanner object for accepting input
Scanner sc = new Scanner(System.in);
int loopCont = 0;
String choice;
while(loopCont == 0){
System.out.print("Continue? (y/n): ");
choice = sc.nextLine();
if (choice.equalsIgnoreCase("y"))
loopCont = 1;
else if (choice.equalsIgnoreCase("n")){
loopCont = 1;
System.exit(0);
}
else
System.out.println("Error! Entry must be 'y' or 'n'. Try again.");
}

}

public void custEmpChoice(){

// Create Scanner object for accepting input
Scanner sc = new Scanner(System.in);
String choice;
while(loopCont2 == 0){
System.out.print("Create customer or employee? (c/e): ");
choice = sc.nextLine();
if (choice.equalsIgnoreCase("c"))
loopCont2 = 1;
else if (choice.equalsIgnoreCase("e")){
loopCont2 = 2;
}
else
System.out.println("Error! Entry must be 'c' or 'e'. Try again.");
}
}

public void name(Person name){

// Create Scanner object for accepting input
Scanner sc = new Scanner(System.in);
String firstName;
String lastName;

// Loop for obtaining and setting First Name
while(loopCont3 == 0){
System.out.print("Enter first name: ");
firstName = sc.nextLine();
if (firstName.length() &gt; 3){
loopCont3 = 1;
name.setFirstName(firstName);
}
else
System.out.println("Error! Name must be longer "
+ "than 3 characters. Try again.");
}

// Loop for obtaining and setting Last Name
// Loop for obtaining and setting First Name
while(loopCont4 == 0){
System.out.print("Enter last name: ");
lastName = sc.nextLine();
if (lastName.length() &gt; 3){
loopCont4 = 1;
name.setLastName(lastName);
}
else
System.out.println("Error! Name must be longer "
+ "than 3 characters. Try again.");
}
}

public void email(Person name){

// Create Scanner object for accepting input
Scanner sc = new Scanner(System.in);
String email;

// Loop for obtaining and setting First Name
while(loopCont5 == 0){
System.out.print("Enter email address: ");
email = sc.nextLine();
if (email.length() &gt; 10){
loopCont5 = 1;
name.setEmail(email);
}
else
System.out.println("Error! Email must be longer "
+ "than 10 characters. Try again.");
}
}

public void customerNumber(Customer name){

// Create Scanner object for accepting input
Scanner sc = new Scanner(System.in);
String customerNumber;

// Loop for obtaining and setting First Name
while(loopCont6 == 0){
System.out.print("Customer number: ");
customerNumber = sc.nextLine();
if (customerNumber.length() &gt; 5){
loopCont6 = 1;
name.setCustomerNumber(customerNumber);
}
else
System.out.println("Error! Customer number must be "
+ "longer than 5 characters. Try again.");
}
}

public void socialSecurity(Employee name){

// Create Scanner object for accepting input
Scanner sc = new Scanner(System.in);
String socialSecurity;

// Loop for obtaining and setting First Name
while(loopCont7 == 0){
System.out.print("Social security number: ");
socialSecurity = sc.nextLine();
if (socialSecurity.length() &gt; 8){
loopCont7 = 1;
name.setSocialSecurity(socialSecurity);
}
else
System.out.println("Error! Social security number must be "
+ "longer than 5 characters. Try again.");
}
}
}

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