面向对象—汽车

 1 package com.hanqi.z1p1;
 2 
 3 public class Jidongche {
 4 
 5     String Number;
 6     int Speed;
 7     double Weight;
 8     
 9     int speedUp(int Speed)
10     {
11         this.Speed+=Speed;
12         System.out.println("车牌号为"+this.Number+"现在的车速是："+this.Speed);
13         return this.Speed;
14     }
15     
16     int speedDown(int Speed)
17     {
18         this.Speed-=Speed;
19         System.out.println("车牌号为"+this.Number+"现在的车速是："+this.Speed);
20         return this.Speed;
21     }
22     
23     String setNumber(String Number)
24     {
25         this.Number=Number;
26         System.out.println("修改后的车牌号是："+this.Number);
27         return this.Number;
28     }
29     
30     void getWeight()
31     {
32         System.out.println("车牌号为"+this.Number+"的载重量为："+this.Weight);
33     }
34     
35     Jidongche()
36     {
37         Number="XX1234";
38         Speed=100;
39         Weight=100;
40     }
41     
42     Jidongche(String Number,int Speed,double Weight)
43     {
44         this.Number=Number;
45         this.Speed=Speed;
46         this.Weight=Weight;
47     }
48     
49     public static void main(String[] args) {
50         // TODO 自动生成的方法存根
51 
52         Jidongche j1=new Jidongche();
53         System.out.println(j1.Number);
54         j1.setNumber("辽A9752");
55         j1.speedUp(100);
56         j1.getWeight();
57         
58         Jidongche j2=new Jidongche("辽B5086",150,200);
59         j2.speedDown(50);
60         j2.speedUp(120);
61         
62         System.out.println("j1的所有信息："+j1.Number+" "+j1.Speed+" "+j1.Weight+" ");
63         System.out.println("j2的所有信息："+j2.Number+" "+j2.Speed+" "+j2.Weight+" ");
64         
65         
66     }
67 
68 }