本人比较懒，所以没有冗余地去定义三个对象组用来存储。但是直接定义Car类的对象进行重载又很不方便。
这时候我突然想到视频中老师提到的“object类是所有类的父类”这一特性，巧妙地使用了这个特点，直接定义了一个长度确定的object对象，并分别重载，是本次实践的一个特色。
价钱都是随机生成的，也借此机会了解了一下Java的输入流、随机数函数等。
今天是第一天开始学习Java，但是程序设计的课已经不知道上了多少，而且之前用其他各种语言也写了很多代码，所以没有什么值得好骄傲的。唯一值得庆幸的，就是每天都在学习心的东西，把自己的想法用不同的编程语言表现出来。
Java的确是一门优秀的语言，体现在他有丰富的库和接口，特别是“一切面向对象”的特性，非常切合现实生活和生产，让我一写就上瘾了。
附：本次课设源代码
Car基类
package FinalProject;
public abstract class Car {
String carName;
boolean isGoods;
int goodsCount;
int mannedCount;
boolean isManned;
float price;
public abstract void showInfo();
public abstract void setName(String thisString);
public void setCount(int i) {}
public void setCount(int i,int j) {}
public abstract void setPrice(float i);
}
载人、载物、双载子类
package FinalProject;
public class Manned extends Car {
@Override
public void setName(String thisName){
carName = thisName;
isGoods = false;
goodsCount = 0;
isManned = true;
}
@Override
public void setCount(int thisCount){
mannedCount = thisCount;
}
@Override
public void setPrice(float thisPrice){
price = thisPrice;
}
@Override
public void showInfo() {
// TODO Auto-generated method stub
System.out.print("车名:"+carName+" 载客量:"+mannedCount+" 价格："+price);
}
}
package FinalProject;
public class Goods extends Car {
@Override
public void setName(String thisName){
carName = thisName;
isGoods = true;
isManned = false;
isManned = false;
mannedCount = 0;
}
@Override
public void setCount(int thisCount){
goodsCount = thisCount;
}
@Override
public void setPrice(float thisPrice){
price = thisPrice;
}
@Override
public void showInfo() {
// TODO Auto-generated method stub
}
}
package FinalProject;
public class Pika extends Car {
@Override
public void setName(String thisName){
carName = thisName;
isManned = true;
isGoods = true;
}
@Override
public void setCount(int thisMannedCount,int thisGoodsCount){
mannedCount = thisMannedCount;
goodsCount = thisGoodsCount;
}
@Override
public void setPrice(float thisPrice){
price = thisPrice;
}
@Override
public void showInfo() {
// TODO Auto-generated method stub
}
}
main代码
package FinalProject;
import java.io.IOException;
import java.util.Scanner;
public class main {
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
int num;
Car thisCar;
Object car[] = new Object[7];
for(num = 0;num < 3;num+=1){
thisCar = new Manned();
car[num] = thisCar;
((Car)car[num]).setName("大众Z"+num);
((Car) car[num]).setPrice((int)(Math.random()*80+100));
((Car) car[num]).setCount((int)(1+Math.random()*(50-10+1)));
}
for(;num < 5;num+=1){
thisCar = new Goods();
car[num] = thisCar;
((Car) car[num]).setName("东风神威"+num);
((Car) car[num]).setPrice((int)(1+Math.random()*70+190));
((Car) car[num]).setCount((int)(1+Math.random()*(50-10+1)));
}
for(;num<7;num+=1){
thisCar = new Pika();
car[num] = thisCar;
((Car) car[num]).setName("丰田GT"+num);
((Car) car[num]).setPrice((int)(1+Math.random()*85+100));
((Car) car[num]).setCount((int)(1+Math.random()*(50-10+1)),(int)(1+Math.random()*(50-10+1)));
}
int choice = 0;
int days = 0;
String getchar;
Scanner scanner = new Scanner(System.in);
while(choice!=1){
System.out.println("欢迎来到英雄联盟");
System.out.println("输入1租车，输入其他退出");
choice = scanner.nextInt();
}
// print the car list
for(num = 0;num < 7;num+=1){
System.out.println(num+"、"+"车名："+((Car)car[num]).carName+" 价格："+((Car)car[num]).price);
if(((Car)car[num]).isManned){
System.out.println(" 载客量："+((Car)car[num]).mannedCount+"人");
}
if(((Car)car[num]).isGoods){
System.out.println(" 载货量："+((Car)car[num]).goodsCount+"吨");
}
}
do{
System.out.println("请输入租车代码");
choice = scanner.nextInt();
}while(choice>num||choice<0);
while(days == 0){
System.out.println("请输入租车时间");
days = scanner.nextInt();
}
System.out.println("租车成功!下面打印租车信息\n");
System.out.println(((Car)car[choice]).carName);
if(((Car)car[choice]).isManned){
System.out.println(" 载客量："+((Car)car[choice]).mannedCount+"人");
}
if(((Car)car[choice]).isGoods){
System.out.println(" 载货量："+((Car)car[choice]).goodsCount+"吨");
}
System.out.println(" 价格："+((Car)car[choice]).price*days);
}
}
随时随地看视频
