1）设计一个账户Account类，属性包括账号、余额、利率、开户日期等信息，方法包括各属性的访问器和修改器、存款、取款以及查询余额等操作。画出该类的UML类图，并编写测试程序进行测试。
（2）汽车的风挡玻璃雨刷（Wiper）是由带刻度盘（Dial）的控制杆（Lever）控制的。这种控制杆有四个位置：停止、间歇、低速和高速，刻度盘有三个位置，分别是数字1、2和3。刻度盘位置指示三种间歇速度，刻度盘的位置只有当控制杆在间歇位置时才有意义。以下表格给出了挡风玻璃雨刷对应控制杆和刻度盘的工作速度（每分钟摇摆次数）：
控制杆 |
停止 |
间歇 |
间歇 |
间歇 |
低速 |
高速 |
刻度盘 |
- |
1 |
2 |
3 |
- |
- |
雨刷 |
0 |
4 |
6 |
12 |
30 |
60 |
注意：控制杆和刻度盘在调节的时候，只能按照顺序调节，例如控制杆只能从停止←→间歇←→低速←→高速，同样，刻度盘的调节过程也必须是1←→2←→3。 采用面向对象编程实现上述雨刷的模拟调节过程。
public class Account {
private int id = 0;
protected double balance = 0;
private double annualInterestRate = 0;
private Date dateCreated = new Date();
Account(){
}
Account(int newId,double bal){
id = newId;
balance = bal;
}
public int getId() {
return id;
}
public void setId(int newId) {
id = newId;
}
public double getBalance() {
return balance;
}
public void setBalance(double bal) {
balance = bal;
}
public double getAnnualInterestRate() {
return annualInterestRate;
}
public void setAnnualInterestRate(double newAnnualInterestRate) {
annualInterestRate = newAnnualInterestRate;
}
public Date getDateCreated() {
return dateCreated;
}
public boolean deposit(double money) {
if(money > 0) {
balance += money;
return true;
}
else
return false;
}
public boolean withDraw(double money) {
if(balance > money) {
balance -= money;
return true;
}
else
return false;
}
}
public class AccountTest1 {
public static void main(String[] args) {
// TODO 自动生成的方法存根
Account A = new Account(12138,5000);
System.out.println("账户");
if(A.withDraw(2500))
System.out.println("Withdraw success!");
else
System.out.println("Withdraw fail!");
if(A.deposit(3000))
System.out.println("deposit success!");
else
System.out.println("deposit fail!");
System.out.println(A.getBalance());
System.out.println(A.getDateCreated());
}
public class Agent {
Brush brush;
Dial dial;
Lever lever;
String s;
Agent(){
}
Agent(Brush bru,Dial dia,Lever lev){
brush = bru;
dial = dia;
lever = lev;
}
public void calculateSpeed() {
int speed = 0;
switch(lever.getLeverPosition()) {
case 1:s="停止";speed = 0;break;
case 2:s="间歇";
switch(dial.getDialPosition()) {
case 1:speed = 4;break;
case 2:speed = 6;break;
case 3:speed = 12;break;
};break;
case 3:s="低速";speed = 30;break;
case 4:s="高速";speed = 60;break;
}
brush.setSpeed(speed);
}
}
public class Brush {
private int speed;
Brush(){
}
Brush(int spe){
speed = spe;
}
public int getSpeed() {
return speed;
}
public void setSpeed(int spe) {
speed = spe;
}
}
public class Dial {
private int position;
Dial(){
}
Dial(int pos){
position = pos;
}
public int getDialPosition() {
return position;
}
public void dialPositionUp() {
if(position < 3)
position++;
else
System.out.println("刻度盘在最高档位了！");
}
public void dialPositionDown() {
if(position > 1)
position--;
else
System.out.println("刻度盘在最低档位了！");
}
}
public class Lever {
private int position;
Lever(){
}
Lever(int pos){
position = pos;
}
public int getLeverPosition() {
return position;
}
public void LeverPositionUp() {
if( position < 4)
position++;
else
System.out.println("控制杆在最高档位了！");
}
public void LeverPositionDown() {
if(position > 1)
position--;
else
System.out.println("控制杆在最低档位了！");
}
}
import java.util.Scanner;
public class BrushTest {
public static void meun() {
System.out.println("What you want to do");
System.out.println("1.Leverup");
System.out.println("2.Leverdown");
System.out.println("3.Dialup");
System.out.println("4.Dialdown");
}
public static void main(String[] args) {
// TODO 自动生成的方法存根
Scanner input = new Scanner(System.in);
Agent A = new Agent(new Brush(0),new Dial(),new Lever(1));
meun();
while(true) {
int number = input.nextInt();
if(number == 0)
break;
switch(number) {
case 1:A.lever.LeverPositionUp();break;
case 2:A.lever.LeverPositionDown();break;
case 3:A.dial.dialPositionUp();break;
case 4:A.dial.dialPositionDown();break;
}
A.calculateSpeed();
System.out.println("控制杆:" +A.s);
System.out.println("刻度盘:"+A.dial.getDialPosition());
}
System.out.println("控制杆 刻度盘 雨刷");
System.out.println(A.s+" "+A.dial.getDialPosition()+" "+A.brush.getSpeed());
input.close();
}
}