java自学 day4

2018-08-02 05:54:03来源：博客园阅读 ()

租车系统

测试类

 1 import java.util.Scanner;
 2 
 3 public class Init {
 4         static int allrennum=0;
 5         static int allhuonum=0;
 6         static int allprice=0;
 7     
 8     public static void main(String[] args) {
 9         System.out.println("欢迎使用答答租车系统：");
10         System.out.println("您是否要租车：1是 0否");
11         Scanner in=new Scanner(System.in);
12         int check=in.nextInt();
13         if(check==1){
14         ren ren=new ren();
15         wu wu=new wu();
16         quan qu=new quan();
17         ren.print(1,"奥迪A4",500,4);
18         ren.print(2,"马自达6",400,4);
19         qu.print(3,"皮卡雪6",450,4,2);
20         ren.print(4,"金龙  ",800,20);
21         wu.print(5, "松花江 ", 400, 4);
22         wu.print(6, "依维柯", 1000, 20);
23         System.out.println("请输入您要租的汽车的数量：");
24         Scanner input=new Scanner(System.in);
25         int nums=input.nextInt();
26         for(int i=1;i<=nums;i++){
27             System.out.println("请输入第"+i+"辆车的序号");
28             int xuhao=in.nextInt();
29             switch(xuhao){
30             case 1:
31                 ren.fuzhi("奥迪A4",500,4);
32                 break;
33             case 2:
34                 ren.fuzhi("马自达6",400,4);
35                 break;
36             case 3:
37                 qu.fuzhi("皮卡雪6",450,4,2);
38                 break;
39             case 4:
40                 ren.fuzhi("金龙  ",800,20);
41                 break;
42             case 5:
43                 wu.fuzhi( "松花江 ", 400, 4);
44                 break;
45             case 6:
46                 wu.fuzhi( "依维柯", 1000, 20);
47                 break;
48             }
49         }
50         System.out.println("请输入天数：");
51         Scanner input2=new Scanner(System.in);
52         int day=input.nextInt();
53         System.out.println("共可载人："+allrennum+"人");
54         System.out.println("共可载货："+allhuonum+"吨");
55         System.out.println("总金额为："+day*allprice+"元");
56         }
57         else{
58             System.out.println("离开");
59         
60         }
61         }
62     }
63

抽象类Car

public abstract class Car {
    int num;
    String name;
    int price;
    
    

}

子类ren (只能载人)

public class ren extends Car {
    int rennum;
    
    public void print(int num,String name,int price,int rennum) {
        System.out.println(num+" "+name+" "+price+"元/天  "+"载人："+rennum+"人");
    }
    public void fuzhi(String name,int price,int rennum) {
        
        Init.allprice+=price;
        Init.allrennum+=rennum;
        
    }

    
}

子类wu (只能载货)

public class wu extends Car {
    int huonum;
    public void print(int num,String name,int price,int huonum) {
        System.out.println(num+" "+name+" "+price+"元/天  "+"载货："+huonum+"吨");
    }
    public void fuzhi(String name,int price,int huonum) {
        
        Init.allprice+=price;
        Init.allhuonum+=huonum;
    }
}

子类quan (都能载)

public class quan extends Car {
     int huonum;
     int rennum;

    public void print(int num,String name,int price,int rennum,int huonum) {
        System.out.println(num+" "+name+" "+price+"元/天  "+"载货："+rennum+"人"+huonum+"吨");
    }
    public void fuzhi(String name,int price,int rennum,int huonum){
        
        Init.allprice+=price;
        Init.allhuonum+=huonum;
        Init.allrennum+=rennum;
    }
}