萌新纯JAVASE练习项目某谷Bank项目------练手几小时完成,熟练度还是低
纯新手自学看完了刘意2014年27天的JAVASE教学,几小时跟着教程完成,拿来练手和回顾知识点都很好.
分享项目链接:链接：https://pan.baidu.com/s/1V5EPSYyeAguXke3g5oWf6w
提取码：j7rr
复制这段内容后打开百度网盘手机App，操作更方便哦
心得:完成过程中没有什么难点,当一点小失误被Debug掉后,成就感和游戏攻略完成的快感一样苏爽,可能这就是编程吧,贴上我自己的代码,留点成长的足迹吧.
package banking;
import banking.domain.OverdraftException;
public class Account {
protected double balance;
public Account(double init_balance){
this.balance = init_balance;
}
public double getBalance() {
return balance;
}
/**
* 存钱方法
* @param amt: 存款的钱数
* @return: 返回存款是否成功
*/
public boolean deposit(double amt){
this.balance += amt;
return true;
}
/**
* 取钱方法
* @param amt: 取款的钱数
* @return: 返回取款是否成功
*/
public void withdraw(double amt)throws OverdraftException{
if(amt>balance){
throw new OverdraftException("资金不足:",amt-balance);
}else{
balance-=amt;
}
package banking;
import java.util.ArrayList;
import java.util.Iterator;
public class Bank {
//当前 Bank 中有多个 Cutomer
private ArrayList customers = new ArrayList();
//表示 customers 变量中有多少个真正的 Customer 对象
// private int numberOfCustomer=0;
private Bank() {}
private static Bank bank = new Bank();
public static Bank getBank(){
return bank;
}
/**
* 根据传入的参数创建一个新的 Cusotmer 对象, 并把该对象赋给 customers 中指定的元素
* @param firstName
* @param lastName
*/
public void addCustomer(String firstName, String lastName){
//1.根据传入的参数创建一个新的 Cusotmer 对象
Customer cust = new Customer(firstName, lastName);
// //2.把 1 新创建的 Customer 对象赋给 customers 中指定的元素
// customers[numberOfCustomer] = cust;
// //3. 使表示 customers 变量中有多少个真正的 Customer 对象的整数 + 1
// numberOfCustomer++;
customers.add(cust);
}
/**
* 返回 表示 customers 变量中有多少个真正的 Customer 对象的整数
* @return
*/
public int getNumOfCustomers(){
// return numberOfCustomer;
return customers.size();
}
/**
* 返回指定索引对应的 Customer 对象
* @param index
* @return
*/
public Customer getCustomer(int index){
// return customers[index];
return customers.get(index);
}
public Iterator getCustomers(){
return customers.iterator();
}
}
package banking;
import banking.domain.OverdraftException;
public class CheckingAccount extends Account {
//表示透支保护
private double overdraftProtection;
public CheckingAccount(double init_balance) {
super(init_balance);
}
public CheckingAccount(double init_balance, double overdraftProtection){
super(init_balance);
this.overdraftProtection = overdraftProtection;
}
/**
* 重写 withdraw 方法；
*
* 此方法必须执行下列检查。如果当前余额足够弥补取款amount,则正常进行。
* 如果不够弥补但是存在透支保护，则尝试用overdraftProtection得值来弥补该差值（balance-amount）.
* 如果弥补该透支所需要的金额大于当前的保护级别。则整个交易失败，但余额未受影响。
*
*/
@Override
public void withdraw(double amt)throws OverdraftException {
if(balance >= amt){
balance -= amt;
}else if(overdraftProtection==0){
throw new OverdraftException("no overdraft protection", amt-balance);
}else if(overdraftProtection<=(amt-balance)){
throw new OverdraftException("Insufficient funds for overdraft protection", amt-balance);
}else{
overdraftProtection-=(amt-balance);
balance = 0;
}
package banking;
import java.util.ArrayList;
import java.util.Iterator;
public class Customer {
private String firstName;
private String lastName;
//代表用户有的账户属性
private ArrayList accounts = new ArrayList();
// private int index;
public Customer(String firstName, String lastName) {
this.firstName = firstName;
this.lastName = lastName;
}
// public Account getAccount() {
// return account;
// }
//
// public void setAccount(Account account) {
// this.account = account;
// }
public String getFirstName() {
return firstName;
}
public String getLastName() {
return lastName;
}
public void addAccount(Account a){
// account[index] = a;
// index++;
accounts.add(a);
}
public Account getAccount(int i){
// return account[i];
return accounts.get(i);
}
public int getNumOfAccounts(){
return accounts.size();
}
public Iterator getAccounts(){
return accounts.iterator();
}
}
`
}
}
package banking;
public class SavingsAccount extends Account {
// 利率
private double interestRate;
public SavingsAccount(double init_balance, double interestRate) {
super(init_balance);
this.interestRate = interestRate;
}
public double getInterestRate() {
return interestRate;
}
}
package banking.domain;
public class OverdraftException extends Exception{
/**
*
*/
private static final long serialVersionUID = 3782596134442853340L;
private double deficit;
public double getDeficit(){
return deficit;
}
public OverdraftException(String message,double deficit){
super(message);
this.deficit = deficit;
}
}
package banking.reports;
import banking.Account;
import banking.Bank;
import banking.CheckingAccount;
import banking.Customer;
import banking.SavingsAccount;
public class CustomerReport {
public void generateReport(){
System.out.println("\t\t\tCUSTOMERS REPORT");
System.out.println("\t\t\t================");
Bank bank = Bank.getBank();
Customer customer;
for ( int cust_idx = 0; cust_idx < bank.getNumOfCustomers(); cust_idx++ ) {
customer = bank.getCustomer(cust_idx);
System.out.println();
System.out.println("Customer: "
+ customer.getLastName() + ", "
+ customer.getFirstName());
for ( int acct_idx = 0; acct_idx < customer.getNumOfAccounts(); acct_idx++ ) {
Account account = customer.getAccount(acct_idx);
String account_type = "";
if(account instanceof SavingsAccount){
System.out.println("Savings Account: current balance is ￥"+account.getBalance());
}
if(account instanceof CheckingAccount){
System.out.println("CheckingAccount: current balance is ￥"+account.getBalance());
}
}
}
}
}
作者：DrugHua
