Java 对汽车实行不同的折扣

我刚刚接触java编程，我需要帮助打印折扣应用后的汽车价格。此时将显示折扣金额

public class carApplication {

    public static void main(String[] args) {


        Car car1 = new Car("Toyota", "2012", 13500.00);
        Car car2 = new Car("Audi", "2011", 12000.00);

        System.out.printf("Car 1 Model: %s; Car year: %s; Car Price: %.2f\n",
                car1.getModel(), car1.getYear(), car1.getcarPrice());

        System.out.printf("Car 1 Model: %s; Car year: %s; Car Price: %.2f\n",
                car2.getModel(), car2.getYear(), car2.getcarPrice());

        System.out.println("Car Price after applying discount");
        car1.setcarPrice(car1.getcarPrice()*(0.05));
        car2.setcarPrice(car2.getcarPrice()*(0.07));

        System.out.printf("Car 1 Model: %s; Car year: %s; Car Price: %.2f\n",
                car1.getModel(), car1.getYear(), car1.getcarPrice());

        System.out.printf("Car 1 Model: %s; Car year: %s; Car Price: %.2f\n",
                car2.getModel(), car2.getYear(), car2.getcarPrice());
    }
}

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@Mkreegs是对的，你应该写

car1.setcarPrice(car1.getcarPrice()*(1 - 0.05));
car2.setcarPrice(car2.getcarPrice()*(1 - 0.07));

或者直接：

car1.setcarPrice(car1.getcarPrice()*(0.95));
car2.setcarPrice(car2.getcarPrice()*(0.93));

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它显示折扣金额，因为您将价格设置为getcarPrice*0.05，即原价的5%。或者在另一种情况下是7%。正如@肉桂所说，只需乘以1-0.05和1-0.07，或者等于0.95和0.93。与肉桂相同，要得到打折后的汽车价格，你需要从1:getcarPrice*1-0.05中减去打折金额。谢谢，我找到了解决方案