(繼承,多型)

銀行的客戶分為兩類,儲蓄賬戶(SavingAccount)和信用賬戶(CreditAccount),區別在於儲蓄賬戶不允許透支,而信用賬戶可以透支,並允許使用者設定自己的透支額度。

注意:CreditAccount需要多一個屬性 ceiling 透支額度

為這兩種使用者編寫相關的類，同時要求編寫Bank類,屬性：

1.當前所有的賬戶物件的集合,存放在陣列中

2.當前賬戶數量

Account類
package com.work1;

public class Account {

	protected long aid;//賬戶編號
	protected String aname;//賬戶姓名
	protected String username;//使用者名稱
	protected String password;//密碼
	protected String email;//郵箱
	protected double money;//餘額
	public long getAid() {
		return aid;
	}
	public void setAid(long aid) {
		this.aid = aid;
	}
	public String getAname() {
		return aname;
	}
	public void setAname(String aname) {
		this.aname = aname;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
	public double getMoney() {
		return money;
	}
	public void setMoney(double money) {
		this.money = money;
	}
	
	
}
 

Bank類

package com.work1;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Bank {
	
	private static List<Account> list=new ArrayList<Account>();
	
	//開戶
	public void  openAccount(){
		Scanner input =new Scanner(System.in);
		System.out.println("請選擇開戶型別:");
		System.out.println("1: 儲蓄賬戶");
		System.out.println("2: 信用賬戶");
		int choice=input.nextInt();
		switch(choice){
			case 1:
				long aid=System.currentTimeMillis();//賬戶編號
				System.out.println("請輸入賬戶姓名：");
				String name=input.next();
				System.out.println("請輸入使用者名稱：");
				String username=input.next();
				System.out.println("請輸入密碼：");
				String password=input.next();
				System.out.println("請輸入郵箱：");
				String email=input.next();
				Account ac=new SavingAccount(aid,name,username,password,email,0.0);
				list.add(ac);
				break;
			case 2:
				long aid1=System.currentTimeMillis();//賬戶編號
				System.out.println("請輸入賬戶姓名：");
				String name1=input.next();
				System.out.println("請輸入使用者名稱：");
				String username1=input.next();
				System.out.println("請輸入密碼：");
				String password1=input.next();
				System.out.println("請輸入郵箱：");
				String email1=input.next();
				System.out.println("請設定透支額度：");
				double ceilling=input.nextDouble();
				Account ac1=new CreditAccount(aid1,name1,username1,password1,email1,ceilling,0.0);
				list.add(ac1);
				break;
		}
		System.out.println("開戶成功");
	}
	
	
	//登入
	public void  login(){
		Scanner input =new Scanner(System.in);
		System.out.println("請輸入使用者名稱");
		String username=input.next();
		System.out.println("請輸入密碼");
		String password=input.next();
		Account at=null;
		for(Account ac:list){
			if(ac.getUsername().equals(username)&&ac.getPassword().equals(password)){
				at=ac;
			}
		}
		if(at!=null){
			System.out.println("登入成功");
			System.out.println("請選擇功能：");
			System.out.println("1: 存款");
			System.out.println("2: 取款");
			System.out.println("3: 查詢餘額");
			int choice=input.nextInt();
			switch(choice){
		     	case 1:
		     		System.out.println("歡迎使用存款功能：");
		     		saveMoney(at);
		     		break;
		     	case 2:
		     		System.out.println("歡迎使用取款功能：");
		     		takeMoney(at);
		     		break;
		     	case 3:
		     		loopMoney(at);
		     		break;
			}
		}else{
			System.out.println("賬號或者密碼錯誤");
		}
		
	}
	
	//存款
	public void  saveMoney(Account at){
		Scanner input =new Scanner(System.in);
		System.out.println("請輸入存款金額");
		double money=input.nextDouble();
		at.setMoney(money);
	}
	
	//檢視餘額：
	public void loopMoney(Account at){
		System.out.println("賬戶餘額："+at.getMoney());
	}
	
	
	//取款
	public void  takeMoney(Account at){
		Scanner input =new Scanner(System.in);
		System.out.println("請輸入取款金額");
		double money=input.nextDouble();
		if(at.getMoney()>=money){
			System.out.println("取款成功");
			at.setMoney(at.getMoney()-money);
		}
	}
}
 

/**
 * 信用賬戶 
 *
 */
public class CreditAccount extends Account {

	private double ceiling;//透支額度
	
	public CreditAccount(long aid,String aname,String username,String password,String email,double ceiling,double money){
		this.aid=aid;
		this.aname=aname;
		this.username=username;
		this.password=password;
		this.email=email;
		this.ceiling=ceiling;
		this.money=money;
	}
	
	
	

	public double getCeiling() {
		return ceiling;
	}

	public void setCeiling(double ceiling) {
		this.ceiling = ceiling;
	}
	
	
	
}
 

import java.util.Scanner;

/**
 * 消費者
 */
public class Customer {

	public static void main(String[] args) {
		Scanner input=new Scanner(System.in);
		Bank bk=new Bank();
		int choice;
		do{
		System.out.println("請選擇功能：");
		System.out.println("1:開戶：");
		System.out.println("2:登入：");
		choice=input.nextInt();
		switch(choice){
			case 1:
				bk.openAccount();
				break;
			case 2:
				bk.login();
		}
		}while(choice!=0);
	}
}

/**
 * 儲蓄賬戶
 *
 */
public class SavingAccount extends Account {

	public SavingAccount(long aid,String aname,String username,String password,String email,double money){
		this.aid=aid;
		this.aname=aname;
		this.username=username;
		this.password=password;
		this.email=email;
		this.money=money;
	}
}