12.10课堂学习----实例化、构造方法案例

package com.hanqi;

public class Car
{
//品牌
private String pinP;

// 读
public String getPinP()
{
return pinP;
}

//写
public void setPinP(String pinP)
{
System.out.println("车的品牌设置为" + pinP);

this.pinP = pinP;
}

//状态
private String ZhuangT = "静止";

public String getZhuangT()
{
return ZhuangT;
}

//油量
private double youL = 0;

public double getYouL()
{
return youL;
}

//油箱
private double youX;

public double getYouX()
{
return youX;
}

public void setYouX(double youX)
{
this.youX = youX;
}

//一次加满   方法的重载
public void jiaYou()
{
System.out.println("一次加满");

double yjyl = this.youX - this.youL;

jiaYou(yjyl);
}

//加油
public void jiaYou(double youl)
{
//油箱容量大于0
if (youX <= 0)
{
System.out.println("忘装油箱了");

return;
}

//加油量大于0
else if (youl < 0)
{
System.out.println("不要偷我的油");

return;
}
//只有静止状态下才能加
else if (!ZhuangT.equals("静止"))
{
System.out.println("车熄火了再加油");

return;
}
//不能超过油箱容量
else if (this.youL + youl > this.youX)
{
System.out.println("油箱已经加满了，不要再加了");

double syyl = this.youL;

this.youL = this.youX;

System.out.println("这次加了" + (this.youX - syyl) + "升油");
}
//剩余油量不能小于0
else
{
this.youL += youl;

System.out.println("这次加了" + youl + "升油");
}
}

public void faDong()//无参数也无返回值的方法
{
if (this.youL<=0)
{
System.out.println("没油了，请先加油");
}
else if(!this.ZhuangT.equals("静止"))
{
System.out.println("车已经发动了");
}
else{
this.ZhuangT = "发动";
System.out.println("车发动了");
}
}
private double zongLC;

public double getZongLC() {
return zongLC;
}

//行驶
public void xingS(double lic,double youh)//lic里程youh油耗
{
//车的状态是发动
if(!this.ZhuangT.equals("发动"))
{
System.out.println("请发动汽车");
}
else
{
//行驶
//double zyh = lic * youh / 100;

double lc = this.youL * 100 / youh;
if(lc<lic)
{
System.out.println("最多行驶"+lc+"公里");
this.zongLC +=lc;
this.youL = 0;

}
else
{
System.out.println("行驶了"+ lic +"公里");
this.zongLC += lic;
this.youL -= lic * youh / 100;

}
this.ZhuangT = "静止";
}

//计算总油耗，判断是否没有油了
}

/*public Car()
{
System.out.println("调用了构造方法");
}*/

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

public static void main(String[] args) {

Car mycar = new Car("宝马");//默认构造方法

//mycar.setPinP("宝马");
mycar.xingS(100, 10);

mycar.setYouX(40);

mycar.jiaYou(20);

System.out.println("车的品牌是"+mycar.pinP+",车的油量是" + mycar.getYouL() + "升，车的状态是" + mycar.getZhuangT());

mycar.faDong();
mycar.xingS(300, 10);

mycar.jiaYou(10);

System.out.println("车的油量是" + mycar.getYouL() + "升，车的状态是" + mycar.getZhuangT());

mycar.jiaYou();

System.out.println("车的油量是" + mycar.getYouL() + "升，车的状态是" + mycar.getZhuangT());

}
}