新手入门，请各位同学和大神们多多指导。
目前只使用到了继承，多态，对于main中的数组这块研究了一晚上，还有点模糊。期间参考了几位同学的写的代码，自己总结了下，代码如下；
父类car
public class Car {//客车涉及的参数 名称 价格 载人数 载货数
public String name;
public double price;
public int manned;
public double cargo;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public int getManned() {
return manned;
}
public void setManned(int manned) {
this.manned = manned;
}
public double getCargo() {
return cargo;
}
public void setCargo(int cargo) {
this.cargo = cargo;
}
}
客车
public class PassengerCar extends Car {//客车的 属性和构造函数
private String name;
private int manned;
private double price;
public PassengerCar(String name,int manned,int price){
this.name=name;
this.manned=manned;
this.price=price;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getManned() {
return manned;
}
public void setManned(int manned) {
this.manned = manned;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
@Override
public String toString() {
return "小汽车 [名称=" + name + ", 载人数=" + manned + ", 价格="
+ price + "]";
}
}皮卡
public class Pickup extends Car {//皮卡属性
private String name;
private int manned;
private double price;
private double cargo;
public Pickup(String name,double cargo,double price,int manned){
this.name=name;
this.manned=manned;
this.price=price;
this.cargo=cargo;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getManned() {
return manned;
}
public void setManned(int manned) {
this.manned = manned;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public double getCargo() {
return cargo;
}
public void setCargo(double cargo) {
this.cargo = cargo;
}
@Override
public String toString() {
return "皮卡 [名称=" + name + ", 载人=" + manned + ", 价格="
+ price + ", 载重=" + cargo + "]";
}
}货车
public class Truck extends Car {//货车的属性和构造函数
private String name;
private double cargo;
private double price;
public Truck(String name,double cargo,double price){
this.name=name;
this.cargo=cargo;
this.price=price;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getCargo() {
return cargo;
}
public void setCargo(double cargo) {
this.cargo = cargo;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
@Override
public String toString() {
return "货车 [名称=" + name + ", 载重=" + cargo + ", 价格="
+ price + "]";
}
}
主函数
import java.util.*;
//import java.
public class Initail {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("欢迎使用答答租车系统");
System.out.println("您是否需要租车：1 是，0 否");
Scanner sc=new Scanner(System.in);
int input1=sc.nextInt();//获取输入的值
if (input1==0) {//判断值如果为1 操作 遍历显示所有的车型 ，判断需求的车辆数量 天数 和载重 ，统计total
System.out.println("谢谢");
}else if (input1==1) {
Car[] cars={new PassengerCar("奥迪A4",5,500),
new Truck("小货车",5,150),
new PassengerCar("奔驰E400",5,700),
new Pickup("皮卡",1.5,200,4),
new Truck("大型货车",600,10),
new PassengerCar("大客车",25,650)};
for(int i=0;i<cars.length;i++){//遍历所有车型
System.out.println("车型为 "+cars[i]+"序号为"+(i+1));
}
System.out.println("请输入需要租车的数量");
int input2=sc.nextInt();//获取租车数量
double totalprice=0;
int totalper=0;
double totalicargo=0;
if (input2>0&&input2<=6) {
for(int j=0;j<input2;j++){//获取租车数量 判断是哪种类型的租车 然后输出名称 钱和载人或载重
System.out.println("请输入需要租车的序号");
int input3=sc.nextInt();
int a =input3-1;
if (cars[a] instanceof PassengerCar) {//如果是客车 输出载人 名称和价格
System.out.println(cars[a]);
}else if(cars[a] instanceof Truck) {
System.out.println(cars[a]);
}else if (cars[a] instanceof Pickup){
System.out.println(cars[a]);
}else {
System.out.println(cars[a]);
}
//获取选择中的钱 名称 载重 载人
totalper=totalper+((Car) cars[a]).getManned();
totalicargo+=((Car) cars[a]).getCargo();
totalprice+=((Car) cars[a]).getPrice();
}
}else {
System.out.println("输入有误 请重新输入");
}
System.out.println("请输入需要租用的天数");
int input4=sc.nextInt();
if (input4>0) {
double sumpri=0;
double sumico=0;
int sumper=0;
sumpri=input4*totalprice;
sumico=input4*totalicargo;
sumper=input4*totalper;
System.out.println("您的账单如下");
System.out.println("总价格"+sumpri+"总载重"+sumico+"总载人"+sumper);
}else {
System.out.println("输入有误");
sc.close();
}
}
}
}
以上就是，这是运行结果
现在是主要是去完善这个代码，如何利用上接口和优化下主函数 ，父类如果用抽象类的话这么写，我的再想想，请各位大神指点。
随时随地看视频
