面向对象编程（OOP）————修饰符

  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 getDangqianyl()
 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("不可能这麽开车");
 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     public String getYanse() {
 95         return yanse;
 96     }
 97 
 98     public void setYanse(String yanse) {
 99         this.yanse = yanse;
100     }
101 
102     public String getPinpai() {
103         return pinpai;
104     }
105 
106     public void setPinpai(String pinpai) {
107         this.pinpai = pinpai;
108     }
109 
110     public double getYouxiangrl() {
111         return youxiangrl;
112     }
113 
114     public void setYouxiangrl(double youxiangrl) {
115         this.youxiangrl = youxiangrl;
116     }
117 
118     public Car(String pinpai, double youxiangrl) {
119         super();
120         this.pinpai = pinpai;
121         this.youxiangrl = youxiangrl;
122     }
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         
138         System.out.println("油箱容量="+myBenchi.getYouxiangrl());
139         
140         myBenchi.xingshi(200, 13);
141         
142         myBenchi.jiaYou(30);
143         
144         myBenchi.jiaYou(30);
145         
146         System.out.println("当前油量="+myBenchi.getDangqianyl());
147         
148         myBenchi.xingshi(300, -15);
149         
150         System.out.println("当前油量="+myBenchi.getDangqianyl());
151         
152         myBenchi.xingshi(200, 13);
153         
154         System.out.println("当前总里程="+myBenchi.getXingshizlc());
155         
156         System.out.println("当前油量="+myBenchi.getDangqianyl());
157     }
158     
159 
160 }