创建Car类

package org.hanqi.pn0120;

//汽车类
public class Car {
    //颜色
    private String yanse;
    //品牌
    private String pinpai;
    //油箱容量
    private double rongliang=40;
    //当前油量
    private double dangqianyouliang=0;
    public double getDangqianyouliang()
    {
        return this.dangqianyouliang;
    }
    
    //加油
    public void jiayou(double youliang)
    {
        if(youliang<0)
        {
            System.out.println("不要偷油");
        }
        else if(this.dangqianyouliang+youliang>this.rongliang)
        {
            double benciyouliang=this.rongliang-this.dangqianyouliang;
            this.dangqianyouliang=this.rongliang;
            System.out.println("油箱已加满，这次加了"+benciyouliang+"升油");
        }
        else
        {
            this.dangqianyouliang+=youliang;
            System.out.println("这次加了"+youliang+"升油");
        }
        
    }
    private double xingshizonglucheng=0;
    public double getXingshizonglucheng()
    {
        return this.xingshizonglucheng;
    }
    //行驶
    public void xingshi(double xingshiluchen,double youhao)
    {
        if(this.dangqianyouliang<=0)
        {
            System.out.println("车没油了，怎么跑");
            return;
        }
        if(xingshiluchen<0||youhao<0)
        {
            System.out.println("不可能这么开车");
        }
        else
        {
        
        //油耗
        double dangqianyouhao=xingshiluchen*youhao/100;
        this.dangqianyouliang-=dangqianyouhao;
        
        //验证当前油量
        //第一种方式 三元运算法
        //this.dangqianyouliang=this.dangqianyouliang>0?this.dangqianyouliang:0;
        if(this.dangqianyouliang<0)
        {
            this.dangqianyouliang=0;
            System.out.println("你是推着车走的吗？");
        }
        
        this.xingshizonglucheng+=xingshiluchen;
        System.out.println("本次行驶了"+xingshiluchen+"公里");
        }
    }
    
    
    public String getYanse() {
        return yanse;
    }
    public void setYanse(String yanse) {
        this.yanse = yanse;
    }
    public String getPinpai() {
        return pinpai;
    }
    public void setPinpai(String pinpai) {
        this.pinpai = pinpai;
    }
    public double getRongliang() {
        return rongliang;
    }
    public void setRongliang(double rongliang) {
        this.rongliang = rongliang;
    }
    public Car(String pinpai, double rongliang) {
        super();
        this.pinpai = pinpai;
        this.rongliang = rongliang;
    }
    
    //main方法
    public static void main(String[] args)
    {
        Car myBenchi=new Car("奔驰",50);
        System.out.println("品牌="+myBenchi.getPinpai());
        System.out.println("油箱容量="+myBenchi.getRongliang());
        myBenchi.xingshi(200, 13);
        myBenchi.jiayou(30);
        myBenchi.jiayou(30);
        System.out.println("当前油量="+myBenchi.getDangqianyouliang());
        myBenchi.xingshi(300,15);
        
        
        System.out.println("当前油量="+myBenchi.getDangqianyouliang());
        myBenchi.xingshi(200, 13);
        System.out.println("当前总里程="+myBenchi.xingshizonglucheng);
        System.out.println("当前油量="+myBenchi.getDangqianyouliang());
    }
    
    
}