首先创建了抽象类Che
package com.zuche;
public abstract class Che {
String name;
int xuhao;
float price;
int zairen;
int zaihuo;
public abstract void chenhuo();
public abstract void chenren();
}其次创建了三个子类继承
（我的子类继承的函数没怎么用，只作了信息输出）
（1）Bus
package com.zuche;
public class Bus extends Che {
@Override
public void chenhuo() {
// TODO Auto-generated method stub
System.out.println(xuhao+"\t"+name+"\t"+price+"元/天\t"+zaihuo+"吨");
}
@Override
public void chenren() {
// TODO Auto-generated method stub
}
}（2）Car
package com.zuche;
public class Car extends Che {
@Override
public void chenren() {
// TODO Auto-generated method stub
System.out.println(xuhao+"\t"+name+"\t"+price+"元/天\t"+zairen+"人");
}
@Override
public void chenhuo() {
// TODO Auto-generated method stub
}
}（3）PiCa
package com.zuche;
public class PiCa extends Che {
@Override
public void chenhuo() {
// TODO Auto-generated method stub
}
@Override
public void chenren() {
// TODO Auto-generated method stub
System.out.println(xuhao+"\t"+name+"\t"+price+"元/天\t"+zairen+"人\t"+zaihuo+"吨");
}
}最后正文：
package com.zuche;
import java.util.Scanner;
public class Dada {
public static void main(String[] args) {
// TODO Auto-generated method stub
Che a1=new Car();a1.xuhao=1;a1.name="奥迪A4";a1.price=500;a1.zairen=4;
Che a2=new Car();a2.xuhao=2;a2.name="马自达6";a2.price=400;a2.zairen=4;
Che a3=new PiCa();a3.xuhao=3;a3.name="皮卡雪";a3.price=500;a3.zairen=4;a3.zaihuo=2;
Che a4=new Car();a4.xuhao=4;a4.name="金龙";a4.price=800;a4.zairen=20;
Che a5=new Bus();a5.xuhao=5;a5.name="松花江";a5.price=400;a5.zaihuo=4;
Che a6=new Bus();a6.xuhao=6;a6.name="依维柯";a6.price=1000;a6.zaihuo=20;
// a1.chenren();
System.out.println("欢迎使用答答租车系统");
System.out.println("您是否要租车：1是 0否");
Scanner scanner = new Scanner(System.in);
int flag = scanner.nextInt();
if (flag == 1) { System.out.println("您可租车的类型及其价目表：");
System.out.println("序号"+"\t"+"汽车名称 "+"\t"+"租金"+"\t"+"\t容量");
a1.chenren();
a2.chenren();
a3.chenren();
a4.chenren();
a5.chenhuo();
a6.chenhuo();
System.out.println("输入租车数量:");
Scanner scanner2 = new Scanner(System.in);
flag = scanner.nextInt();
int[]a=new int[flag]; //定义一个数组存储租车序号
for(int i=1;i<=flag;i++){
System.out.println("第"+i+"的序号为");
a[i-1]=scanner.nextInt(); //将租车序号存入数组
}
System.out.println("租车天数为");
int b=scanner.nextInt(); //b为天数
System.out.println(b+"天");
System.out.println("您的账单：");
int x=0;//all zairen
int y=0;//all zaihuo
int z=0;//all price
int ZR1=0;//确定数组的个数
int ZH1=0;//确定数组的个数
for(int i=1;i<=flag;i++){
switch(a[i-1]){
case 1:ZR1+=1;x+=4;z+=500;break;
case 2:ZR1+=1;x+=4;z+=400;break;
case 3:ZR1+=1;ZH1+=1;x+=4;y+=2;z+=450;break;
case 4:ZR1+=1;x+=20;z+=800;break;
case 5:ZH1+=1;y+=4;z+=400;break;
case 6:ZH1+=1;y+=20;z+=1000;break;
}
}
String []ZR=new String[ZR1];//all zairen ming
String []ZH=new String[ZH1];//all zaihuo ming
/* int q=0; int p=0; for(int i=1;i<=flag;i++){
if (a[i-1]==1) {q++; ZR[q-1]="奥迪A4,";}
if (a[i-1]==2) {q++; ZR[q-1]="马自达6,";}
if (a[i-1]==3) {q++; ZR[q-1]="皮卡雪6,";}
if (a[i-1]==4) {q++; ZR[q-1]="金龙,"; }
if (a[i-1]==3) {p++; ZH[p-1]="皮卡雪6,";}
if (a[i-1]==5) {p++; ZH[p-1]="松花江,";}
if (a[i-1]==6) {p++; ZH[p-1]="依维柯,";}
}*/ //可以替换下面的switch
int q=0;int p=0; for(int i=1;i<=flag;i++){
switch(a[i-1]){
case 1:q++;ZR[q-1]="奥迪A4,"; break;
case 2:q++;ZR[q-1]="马自达6,";break;
case 3:q++;ZR[q-1]="皮卡雪6,";p++;ZH[p-1]="皮卡雪6,";break;
case 4:q++;ZR[q-1]="金龙,";break;
case 5:p++;ZH[p-1]=("松花江,");break;
case 6:p++;ZH[p-1]=("依维柯,");break;
default:break;
};}//zairen,zaiwu 数组填充
for(int i=1;i<=ZR1;i++){System.out.println("***可载人的车有："+ZR[i-1]);}
System.out.println(" 共载人："+x+"人");
for(int i=1;i<=ZH1;i++){System.out.println("***可载货的车有："+ZH[i-1]);}
System.out.println(" 共载货："+y+"吨");
System.out.println("租车总价格："+z*b+"元");
System.out.print("感谢使用！"); }
else{System.out.println("感谢使用！欢迎再来使用！"); }
}
}测试结果如下：