/*

 * 父类

 * */

package DDlease;

public abstract class Car {

public int sum;//总金额

public abstract void money(int number,int days);//计算总金额

}

/*

 * 载人客车子类

 * */

package DDlease;

public class CarToPeople extends Car {

String CarName[][] = new String[][]

{{"1.奥迪A4限载4人 ","500元/天"},{"2.马自达限载4人 ","400/天"},{"3.金龙限载20人 ","800元/天"}};//客车数组

public void print() {

for(int i = 0; i<CarName.length; i++) {

for(int j = 0;j<2;j++) {

System.out.print(CarName[i][j]);

}

System.out.println();

}

}

public void money(int number,int days) {//计算总金额

if(number == 1) {

sum = days*500;

System.out.println("总金额为："+sum+"元");

}

if(number == 2) {

sum = days*400;

System.out.println("总金额为："+sum+"元");

}

if(number == 3) {

sum = days*800;

System.out.println("总金额为："+sum+"元");

}

}

}

/*

 * 载货车子类

 * */

package DDlease;

public class CarToThing extends Car {

String CarName[][] = new String[][]

{{"4.松花江限载4T ","400元/天"},{"5.依维柯限载4T ","1000元/天"}};//货车数组

public void print() {

for(int i = 0; i<CarName.length; i++) {

for(int j = 0;j<2;j++) {

System.out.print(CarName[i][j]);

}

System.out.println();

}

}

@Override

public void money(int number,int days ) {

if(number == 4) {

sum = days*400;

System.out.println("总金额为："+sum+"元");

}

if(number == 5) {

sum = days*1000;

System.out.println("总金额为："+sum+"元");

}

}

}

/*

 * 皮卡子类

 * */

package DDlease;

public class CarToBoth extends Car {

String CarName[] = new String[]

{"6.皮卡雪限载4人2T","450元/天"};//皮卡载人4载货2T

public void print() {

System.out.println(CarName[0]+" "+CarName[1]);

System.out.println();

}

@Override

public void money(int number,int days) {

// TODO Auto-generated method stub

if(number == 6) {

sum = days*450;

System.out.println("总金额为："+sum+"元");

}

}

}

/*

 * 测试类

 * */

package DDlease;

import java.util.Scanner;

public class Main {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner input = new Scanner(System.in);

System.out.println("欢迎进入DD租车，是否租车：1租车2退出");

int a = input.nextInt();

if(a == 1) {

/*

* 打印基本信息

* */

System.out.println("这是我们公司的全部车型及价格和数据：");

CarToPeople car1 = new CarToPeople();//载客车

CarToThing car2 = new CarToThing();//载货车

CarToBoth car3 = new CarToBoth();//皮卡

car1.print();car2.print();car3.print();

/*

* 开始租车

* */

System.out.println("请输入想租车的序号和天数：");

int number= input.nextInt();

int days = input.nextInt();

if(number==1||number==2||number==3) {

car1.money(number,days);

}

if(number==4||number==5) {

car2.money(number,days);

}

if(number==6) {

car3.money(number,days);

}

System.out.println("租车完成，祝您生活愉快！");

}else {

input.close();

System.out.println("欢迎下次光临！再见！");

}

}

}

运行没有问题~