/* 电在传输上都会有损耗,假如计算电费时区分冬季和夏季用电情况,冬季在用电原有读数上加上20千瓦小时作为用电损耗,而夏季没有此损耗问题。电费是每千瓦小时电0.49元,假定用电度数为125千瓦小时,创建一个抽象类Season ,有抽象方法calcFee(int i),分别计算出冬季Winter和夏季Summer相应的电费,最后创建一个工具类FeeUtil,有方法fee(Season s,int count)计算并打印电费。*///创建一个抽象类Seasonpublic abstract class Season {
public abstract double calcFee(int i);
}
//创建一个冬季Winter类public class Winter extends Season {
@Override
public double calcFee(int i) {
// TODO Auto-generated method stub
return (i +20)*0.49;
}
}
//创建一个夏季Summer类
public class Summer extends Season {
@Override
public double calcFee(int i) {
// TODO Auto-generated method stub
return i*0.49;
}
}
//最后创建一个工具类FeeUtil,有方法fee(Season s,int count)计算并打印电费。public class FeeUtil{
public void fee(Season s,int count){
System.out.println("电费是:" + s.calcFee(count));
}
}
// 测试类:public class Test03 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Winter w = new Winter();
System.out.println("冬季电费:" + w.calcFee(20));
Summer s = new Summer();
System.out.println("夏季电费:" + s.calcFee(20));
FeeUtil f = new FeeUtil();
System.out.print("冬季---");
f.fee(new Winter(), 5);
System.out.print("夏季---");
f.fee(new Summer(), 5);
}
}