重载

package duixiang;

public class Car {
    // 品牌
    private String pinpai;

    // 读
    public String getPinpai() {
        return pinpai;
    }

    // 写
    public void setPinpai(String pinpai) {
        System.out.println("车的品牌设置为" + pinpai);
        this.pinpai = pinpai;
    }

    // 状态
    private String zhuangtai = "静止";

    public String getzhuangtai() {
        return zhuangtai;
    }

    // 油量
    private double youliang = 0;

    public double getYouliang() {
        return youliang;
    }

    // 油箱
    private double youxiang;

    public double getYouxiang() {
        return youxiang;
    }

    public void setYouxiang(double youxiang) {
        this.youxiang = youxiang;
    }

    // 一次加满
    public void jiayou() {
        System.out.println("一次加满");
        double yici = this.youxiang - this.youliang;
        jiayou(yici);
    }

    // 加油
    public void jiayou(double youliang) {
        // 油箱容量大于0
        if (youxiang <= 0) {
            System.out.println("你忘了带油箱");
            return;
        }
        // 加油量大于0
        else if (youliang < 0) {
            System.out.println("不要偷我的油");
            return;

        }
        // 静止状态才能加油
        else if (!zhuangtai.equals("静止")) {
            System.out.println("车停了再加油");
            return;
        }
        // 不能超过油箱容量
        else if (this.youliang + youliang > this.youxiang) {
            System.out.println("油箱已将加满了,不要再加了");

            double shengyu = this.youliang;
            this.youliang = this.youxiang;
            System.out.println("这次加了" + (this.youxiang - shengyu) + "升油");
        } else {
            this.youliang += youliang;
        }
        System.out.println("这次加了" + youliang + "升油");
    }

    //发动
    public void fadong() {
        if (this.getYouliang() <= 0) {
            System.out.println("请加油");
        } else if (!this.getzhuangtai().equals("静止")) {
            System.out.println("已经发动");
        } else {
            this.zhuangtai = "发动";
            System.out.println("车子发动了");
        }
    }
    
    private double zongli;
    
    public double getZongli() {
        return zongli;
    }

    //行驶
    public void xingshi(double lu,double youhao)
    {
        //车的状态是发动
        if (!this.zhuangtai.equals("发动"))
        {
            System.out.println("请发动汽车");
        }
        else
        {
            //行驶
            //double zongli=lu*youhao/100;
            double lc=this.youliang*100/youhao;
            if(lc<lu)
            {
                System.out.println("最多行驶"+lc+"公里");
                this.zongli+=lc;
                
                this.youliang=0;
                this.zhuangtai="静止";
            }
            else
            {
                System.out.println("行驶了"+lu+"公里");
                this.zongli+=lu;
                
                this.youliang-=lu*youhao/100;
                
            }
            this.zhuangtai="静止";
        }
        
        //计算总油耗,判断油量
    }

    public Car() {
        System.out.println("默认的构造方法");
    }

    // 重载
    public Car(String pinpai) {
        System.out.println("实例化车的品牌为" + pinpai);
        this.pinpai = pinpai;
    }

}

package duixiang;

public class Test3 {

    public static void main(String[] args) {
        Car car= new Car();//默认构造方法
        car.setPinpai("宝马");
        car.xingshi(100, 10);
        car.fadong();
        System.out.println("车的品牌是"+car.getPinpai()+"车的油量是"+car.getYouliang()+"车的状态是"+car.getzhuangtai());
        car.setYouxiang(40);
        car.jiayou(10);
        car.fadong();
        car.xingshi(200, 10);
        car.jiayou(20);
        car.jiayou(10);
        System.out.println("车的品牌是"+car.getPinpai()+"车的油量是"+car.getYouliang()+"车的状态是"+car.getzhuangtai());

    }

}