Protected string accId
Protected string name;
Protected double money;
Public account (string accId, string name) (
this(accId，name，0)；
}
Public account (string accId, string name, double money) (
this.accId = accId
this.name = name
This.money = money;
}
public void save money(double money){
If (money < = 0) {
System.out.println ("deposit amount must be greater than 0");
}
this . money+= money；
System.out.println ("successful deposit");
}
public double getMoney(double money){
If (money < = 0) {
System.out.println ("withdrawal amount must be greater than 0");
Returns 0;
}
If (this.money < = money) {
System.out.println ("insufficient balance, unable to withdraw money");
Returns 0;
}
This.money -= money;
System.out.println ("successful withdrawal");
Pay back the money;
}
public double getBalance(){
Return the money;
}
Protected double getOverdraft(){
Returns 0;
}
//The equals method is implemented, and the list comparison can be correct.
@ Overlay
Common Boolean equals (object object) {
if(obj == null){
Returns false
}
if(this == obj){
Return true
}
If (object instance of account) {
Returns this. accid.equals ((account) obj). accId)；
}
Returns false
}
@ Overlay
Common string toString() {
Return "account ="+accId+"，name ="+name+"，balance = "+money；
}
}
Public banks {
// Account implements the equals method, so that the list can be found correctly.
Private list & lt account & gtusersAccounts
Public bank () {
UsersAccounts = new ArrayList & lt account & gt ();
}
public void addAccount(Account Account){
if(users counts . contains(account)){
System.out.println ("Failed to add, unable to add the same account");
Return;
}
users counts . add(account)；
}
Public Boolean Deaccount (account account) (
return users counts . remove(account)；
}
public boolean de account(String accId){
Return delAccount (accId, null))；;
}
public boolean exist Account(Account Account){
Returns users counts. contains (account);
}
Public boolean existAccount (string accid) (
Returns the existAccount (accId, null))；;
}
Public account getaccount (stringacid) {
Return userscounts.get (userscounts.index of (new account (accId, null)));
}
public double getAllMoney() {
//Whether it overflows or not, just add up the balances of all users.
Double result = 0;
for(Account Account:users counts){
result+= account . get balance()；
}
Return the result;
}
public double getAllOverdraft() {
//Whether it overflows or not
Double result = 0;
for(Account Account:users counts){
result+= account . get overdraft()；
}
Return the result;
}
public int getAccountNum() {
Returns userscounts.size ();
}
public int getCreditAccountNum(){
int num = 0；
for(Account Account:users counts){
// instanceof performance is not as fast as simple method.
Account instance of CreditAccount) {
num++；
}
}
Quantity returned;
}
public int getSavingAccountNum(){
int num = 0；
for(Account Account:users counts){
Account instance of SavingAccount) (
num++；
}
}
Quantity returned;
}
Public list & lt account & gtgetAllAccount() {
Return to usersAccounts
}
}
Public class CreditAccount extended account {
Private double overdraft;
Public CreditAccount (string accId, string name) (
super(accId，name)；
This. Overdraft =1000;
}
public credit account(String accId，String name，double money){
This (accId, name, money,1000);
}
Public credit account (String Accid, String name, double money, double Overdraft) {
Super (accId, name, money);
This. Overdraft = Overdraft;
}
@ Overlay
public double getMoney(double money){
If (money < = 0) {
System.out.println ("withdrawal amount must be greater than 0");
Returns 0;
}
If(this.money+overdraft < = money) {
System.out.println ("insufficient balance, unable to withdraw money");
Returns 0;
}
This.money -= money;
System.out.println ("successful withdrawal");
Pay back the money;
}
@ Overlay
Public double get overload () {
Return the overdraft;
}
@ Overlay
Common string toString() {
Return "account ="+accId+ ",name ="+name+", balance ="+money+ ",overdraft ="+overdraft;
}
}
public class saving Account extends Account {
Public SavingAccount (string accId, string name)
super(accId，name)；
}
public saving account(String accId，String name，double money) {
Super (accId, name, money);
}
@ Overlay
public double getMoney(double money){
Return super.getMoney (money);
}
@ Overlay
Public double getOverdraft() {
return super . get overdraft()；
}
}
Common class test {
Private static bank bank = newbank ();
Public static void main(String[] args) {
test . gen account()；
//Open an account
account a 1 = new credit account(" 1 "，" 1 "，200，2000)；
Account a2 = new SavingAccount("2 "，" 2 "，300)；
Account a3 = new SavingAccount("3 "，" 3 "，400)；
Account a4 = new CreditAccount("4 ","4 ",500,2000);
Account a5 = new CreditAccount("4 ","5 ",600,2000); //Account number 4 is heavy
bank . add account(a 1)；
bank . add account(a2)；
bank . add account(a3)；
bank . add account(a4)；
bank . add account(a5)；
showNowAccount()；
//Account cancellation
bank . delaccount(" 1 ")；
bank . delaccount(" 2 ")；
showNowAccount()；
//deposit
if(bank . exist account(" 3 "){
account = bank . get account(" 3 ")；
ACC . save money( 100)；
}
showNowAccount()；
//Withdraw money
if(bank . exist account(" 3 "){
account = bank . get account(" 3 ")；
system . out . println(" balance = "+ACC . get balance())；
ACC . getmoney( 100)；
system . out . println(" balance = "+ACC . get balance())；
ACC . getmoney( 1000)；
system . out . println(" balance = "+ACC . get balance())；
}
if(bank . exist account(" 4 "){
account = bank . get account(" 4 ")；
system . out . println(" balance = "+ACC . get balance())；
ACC . getmoney( 100)；
system . out . println(" balance = "+ACC . get balance())；
ACC . getmoney( 1000)；
system . out . println(" balance = "+ACC . get balance())；
ACC . getmoney( 10000)；
system . out . println(" balance = "+ACC . get balance())；
}
system . out . println(bank . getaccountnum())；
system . out . println(bank . getall money())；
system . out . println(bank . getalloverdraft())；
system . out . println(bank . getcreditaccountnum())；
system . out . println(bank . getsavingaccountnum())；
}
Public static void genAccount(){
string s = " 1000 0000 0000 000 "；
Account a = empty;
for(int I = 1； I< 1 1; i ++){
If ((I & 2) = = 0) {
A = new credit account (s+String.valueOf(i), "account"+string.valueof (i));
} Otherwise {
A = new savings account (s+String.valueOf(i), "account"+string.valueof (i));
}
bank . add account(a)；
}
}
Public static void shownowacount () {
for(Account Account:bank . getallaccount()){
system . out . println(account)；
}
}
}