還有什么需要改進的地方嗎（租車公司）
package com.car;
//主要計算
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class Calculation {
public static void rest() {
System.out.println("歡迎進入答答租車責(zé)任有限公司!");
System.out.println("您是否需要租車? 1:yes,0:no");
Scanner scan = new Scanner(System.in);
int t = scan.nextInt();
if (t == 1) {
Calculation.cal();
} else if (t == 0) {
System.out.println("歡迎您的下次光臨!");
} else {
System.out.println("您輸入的信息有誤!");
Calculation.rest();
}
}
public static void cal() {
Car[] cars = { new PassengerCar(1, "奧迪A4", 500, 4),
new PassengerCar(2, "馬自達6", 400, 4),
new PassengerCar(3, " 金龍 ", 800, 20),
new PickUp(4, "皮卡雪6", 450, 4, 2),
new CarryCar(5, "松花江", 400, 2, 4),
new CarryCar(6, "依維柯", 1000, 2, 20) };
Scanner scan = new Scanner(System.in);
System.out.println("序號" + "\t" + "汽車名稱" + "\t" + "租金" + "\t" + "載人"
+ "\t" + "容量");
for (Car car : cars) {
// System.out.println(car.toString());
if (car instanceof PassengerCar) {
// 若它是客車類型的實例，則打印出客車應(yīng)該有的屬性值，這里注意強轉(zhuǎn)，否則不會出現(xiàn)
// passengerCar類的CarCapacity屬性
System.out.println(car.getCarNumber() + "\t" + car.getCarName()
+ "\t" + car.getCarRent() + "/天" + "\t"
+ ((PassengerCar) car).getCarPassenger() + "人");
}
if (car instanceof PickUp) {
System.out.println(car.getCarNumber() + "\t" + car.getCarName()
+ "\t" + car.getCarRent() + "/天" + "\t"
+ ((PickUp) car).getCarPassenger() + "人" + "\t"
+ ((PickUp) car).getCarCarrying() + "噸");
}
if (car instanceof CarryCar) {
System.out.println(car.getCarNumber() + "\t" + car.getCarName()
+ "\t" + car.getCarRent() + "/天" + "\t"
+ ((CarryCar) car).getCarPassenger() + "人" + "\t"
+ ((CarryCar) car).getCarCarrying() + "噸");
}
}
System.out.println("請輸入您要租用的汽車數(shù)量: ");
int talNum = scan.nextInt();// 租用數(shù)量
int talRent = 0;// 租用金額
int peoples = 0;// 載人數(shù)量
int carry = 0;// 載貨數(shù)量
List<Car> carLists = new ArrayList<Car>();
List<Car> pc = new ArrayList<Car>();
List<Car> cc = new ArrayList<Car>();
for (int i = 0; i < talNum; i++) {
System.out.println("請輸入您需要租用的第" + (i + 1) + "輛車的序號:");
int num = scan.nextInt();
if (num <= cars.length) {
System.out.println("1");
carLists.add(cars[num - 1]);
System.out.println("成功添加：" + carLists.get(i).carName);// 獲取車的名稱
talRent += carLists.get(i).carRent;
if (carLists.get(i) instanceof PassengerCar) {
pc.add(cars[num - 1]);
peoples += ((PassengerCar) carLists.get(i)).carPassenger;
}
if (carLists.get(i) instanceof CarryCar) {
cc.add(cars[num - 1]);
carry += ((CarryCar) carLists.get(i)).carCarrying;
}
if (carLists.get(i) instanceof PickUp) {
pc.add(cars[num - 1]);
cc.add(cars[num - 1]);
peoples += ((PickUp) carLists.get(i)).carPassenger;
carry += ((PickUp) carLists.get(i)).carCarrying;
}
// System.out.println(carLists.toString());
// System.out.println(carLists.get(0).carRent);
} else {
System.out.println("輸入的數(shù)據(jù)有誤!");
i--;
continue;
}
}
System.out.println("請輸入您租用的天數(shù):");
int day = scan.nextInt();
if (pc.size() > 0) {
System.out.print("***可載人的車有: ");
for (Car car : pc) {
System.out.print(car.carName + " ");
}
System.out.println(" 可載人總數(shù): " + peoples);
System.out.println();
}
if (cc.size() > 0) {
System.out.print("***可載貨的車有: ");
for (Car car : cc) {
System.out.print(car.carName + " ");
}
System.out.println(" 可載貨總數(shù): " + carry);
System.out.println();
}
System.out.println("租車所用總金額: " + talRent * day);
}
}
//car類
package com.car;
public class Car {
public int carNumber;
public String carName;
public int carRent;
public Car(int i, String string, int j) {
// TODO Auto-generated constructor stub
this.carNumber = i;
this.carName = string;
this.carRent = j;
}
public int getCarNumber() {
return carNumber;
}
public void setCarNumber(int carNumber) {
this.carNumber = carNumber;
}
public String getCarName() {
return carName;
}
public void setCarName(String carName) {
this.carName = carName;
}
public int getCarRent() {
return carRent;
}
public void setCarRent(int carRent) {
this.carRent = carRent;
}
@Override
public String toString() {
return "[carName=" + carName + ", carNumber=" + carNumber
+ ", carRent=" + carRent + "]";
}
}
//貨車類
package com.car;
public class CarryCar extends Car {
public int carPassenger;
public int carCarrying;
public CarryCar(int num, String name, int monery, int passenger,
int carrying) {
super(num, name, monery);
// TODO Auto-generated constructor stub
this.carNumber = num;
this.carName = name;
this.carRent = monery;
this.carPassenger = passenger;
this.carCarrying = carrying;
}
public int getCarPassenger() {
return carPassenger;
}
public void setCarPassenger(int carPassenger) {
this.carPassenger = carPassenger;
}
public int getCarCarrying() {
return carCarrying;
}
public void setCarCarrying(int carCarrying) {
this.carCarrying = carCarrying;
}
@Override
public String toString() {
return carNumber + " " + carName + " " + carRent + " " + carPassenger
+ " " + carCarrying;
}
}
//載人客車
package com.car;
public class PassengerCar extends Car {
public int carPassenger;
public PassengerCar(int num, String name, int monery, int passenger) {
super(num, name, monery);
// TODO Auto-generated constructor stub
this.carNumber = num;
this.carName = name;
this.carRent = monery;
this.carPassenger = passenger;
}
public int getCarPassenger() {
return carPassenger;
}
public void setCarPassenger(int carPassenger) {
this.carPassenger = carPassenger;
}
@Override
public String toString() {
return carNumber + " " + carName + " " + carRent + " " + carPassenger;
}
}
//皮卡
package com.car;
public class PickUp extends Car {
public int carPassenger;
public int carCarrying;
public PickUp(int num,String name, int monery,int passenger,int carrying) {
super (num,name,monery);
// TODO Auto-generated constructor stub
this.carNumber = num;
this.carName = name;
this.carRent = monery;
this.carPassenger = passenger;
this.carCarrying = carrying;
}
public int getCarPassenger() {
return carPassenger;
}
public void setCarPassenger(int carPassenger) {
this.carPassenger = carPassenger;
}
public int getCarCarrying() {
return carCarrying;
}
public void setCarCarrying(int carCarrying) {
this.carCarrying = carCarrying;
}
@Override
public String toString() {
return carNumber + " " + carName + " " + carRent + " " + carPassenger
+ " " + carCarrying;
}
}
//main
package com.car;
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
System.out.println("歡迎進入答答租車責(zé)任有限公司!");
System.out.println("您是否需要租車? 1:yes,0:no");
Scanner scan = new Scanner(System.in);
int t = scan.nextInt();
if (t == 1) {
Calculation.cal();
}else if (t == 0) {
System.out.println("歡迎您的下次光臨!");
} else {
System.out.println("您輸入的信息有誤!");
Calculation.rest();
}
}
}
2016-03-05
考慮一下你使用的數(shù)據(jù)類型。價格和載重用double不是更好