编写一个汽车类

  1 package org.hanqi.pn0120;
  2 
  3 //汽车
  4 public class Car {
  5     
  6     //颜色
  7     private String yanse;
  8     
  9     //品牌
 10     private String pinpai;
 11     
 12     //油箱容量
 13     private double youxiangrl = 40;
 14     
 15     //当前油量
 16     private double dangqianyl = 0;
 17     
 18     public double getDanqianyl()
 19     {
 20         return this.dangqianyl;
 21     }    
 22     
 23     //加油
 24     public void jiaYou(double youliang)
 25     {
 26         if (youliang < 0)
 27         {
 28             System.out.println("不要偷油");
 29         }
 30         else if (this.dangqianyl + youliang > this.youxiangrl)
 31         {
 32             //本次加油量
 33             double bcyl = this.youxiangrl - this.dangqianyl;
 34             
 35             this.dangqianyl = this.youxiangrl;
 36             
 37             System.out.println("油太多了，已经加满了，这次加了 " + bcyl + "升油");
 38         }
 39         else
 40         {            
 41             this.dangqianyl += youliang;    
 42             
 43             System.out.println("这次加了 " + youliang + " 升油");
 44         }
 45     }
 46     
 47     //private double youhao = 
 48     
 49     private double xingshizlc = 0;
 50     
 51     public double getXingshizlc()
 52     {
 53         return this.xingshizlc;
 54     }
 55     
 56     //行驶
 57     public void xingshi(double xingshilc, double youhao)
 58     {
 59         //
 60         if (this.dangqianyl <= 0)
 61         {
 62             System.out.println("车没有油，怎么开车");
 63             
 64             return;            
 65         }
 66         
 67         if (xingshilc < 0 || youhao < 0)
 68         {
 69             System.out.println("不可能这么开车");
 70         }
 71         else
 72         {        
 73         //油耗
 74         double dangqyh = xingshilc * youhao / 100;
 75         
 76         this.dangqianyl -= dangqyh;
 77         
 78         //验证当前油量
 79         //this.dangqianyl = this.dangqianyl > 0 ? this.dangqianyl : 0;
 80         
 81         if(this.dangqianyl < 0)
 82         {
 83             this.dangqianyl = 0;
 84             
 85             System.out.println("你是推着车吗？");
 86         }
 87         
 88         this.xingshizlc += xingshilc;
 89         
 90         System.out.println("本次行驶了 " + xingshilc + " 公里");
 91         }    
 92         
 93     }
 94 
 95     public String getYanse() {
 96         return yanse;
 97     }
 98 
 99     public void setYanse(String yanse) {
100         this.yanse = yanse;
101     }
102 
103     public String getPinpai() {
104         return pinpai;
105     }
106 
107     public void setPinpai(String pinpai) {
108         this.pinpai = pinpai;
109     }
110 
111     public double getYouxiangrl() {
112         return youxiangrl;
113     }
114 
115     public void setYouxiangrl(double youxiangrl) {
116         this.youxiangrl = youxiangrl;
117     }
118 
119     public Car(String pinpai, double youxiangrl) {
120         super();
121         this.pinpai = pinpai;
122         this.youxiangrl = youxiangrl;
123     }
124     
125     //设计模式 - 单例模式（单态模式）
126     
127     //静态 static
128     
129     
130     //main方法
131     public static void main(String[] args)
132     {
133         
134         Car myBenchi = new Car("奔驰", 50);
135         
136         System.out.println("品牌 = " + myBenchi.getPinpai());
137         System.out.println("油箱容量 = " + myBenchi.getYouxiangrl());
138         
139         myBenchi.xingshi(200, 13);
140         
141         myBenchi.jiaYou(30);
142         
143         myBenchi.jiaYou(30);
144         
145 
146         System.out.println("当前油量 = " + myBenchi.getDanqianyl());
147         
148         myBenchi.xingshi(300, 15);
149         
150         System.out.println("当前油量 = " + myBenchi.getDanqianyl());
151 
152         myBenchi.xingshi(200, 13);
153 
154         System.out.println("当前总里程 = " + myBenchi.getXingshizlc());
155         System.out.println("当前油量 = " + myBenchi.getDanqianyl());
156         
157     }
158     
159 
160 }