package zuoye;
//创建父类
public class Txd {
public Txd()
{
}
//属性
//颜色
public String Yanse;
//品牌
public String Pinpai;
//电容量
public int Dl;
//当前电量
public int Xzdl;
//构造方法
public Txd(String yanse,String pinpai,int dl)
{
Yanse = yanse;
Pinpai = pinpai;
Dl = dl;
}
//充电
public void chongdian (int cdl)
{
//实际充电量
int shijidl = Dl - Xzdl;
Xzdl += cdl;
if(Xzdl>=Dl)
{
System.out.println("电量已经充满,停止");
Xzdl=Dl;
}
else
{
shijidl = cdl;
}
System.out.println("充电量" + cdl+", 现在电量"+ Xzdl);
}
//使用一次耗电量
public int Haodianl = 10;
//使用次数
public void shiyong (int cishu)
{
int Y = Haodianl * cishu;
Xzdl -= Y;
//没电了
if(Xzdl<=0)
{
System.out.println("电已经耗尽");
Xzdl = 0;
cishu = Dl/10;
}
System.out.println("使用"+cishu+"次后,当前电量="+Xzdl);
}
}
package zuoye;
//创建子类
public class ttt extends Txd {
public ttt(String yanse,String pinpai,int dl)
{
super(yanse, pinpai, dl);
}
public ttt()
{
}
public void shiyong(int cishu)
{
System.out.println("使用"+cishu+"次后,当前电量="+Xzdl);
}
}
package zuoye;
public class txdtest {
public static void main(String[] args) {
Txd txd = new Txd("科迪","黑色",50 );
txd.Xzdl =30;
txd.chongdian(20);
txd.shiyong(3);
//父类转子类 向上转型
Txd txd1 = new ttt();
txd1.shiyong(1);
}
}
