Java编程（13）-抽象类

抽象类Card：

public abstract class Card {
    private String name;
    private double money;

    
    public abstract void pay(double money);



    public Card() {
    }

    public Card(String name, double money) {
        this.name = name;
        this.money = money;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getMoney() {
        return money;
    }

    public void setMoney(double money) {
        this.money = money;
    }
}

 具体类GoldCard:

public class GoldCard extends Card{

    @Override
    public void pay(double money2) {
        System.out.println("您当前消费："+money2);
        System.out.println("您当前余额为："+getMoney());
        double rs = money2*0.8;
        System.out.println("您实际支付："+rs);
        setMoney(getMoney()-rs);
    }
}

测试类：

public class Test {
    public static void main(String[] args) {
        GoldCard c = new GoldCard();
        c.setMoney(10000);

        c.pay(500);
        System.out.println("剩余："+c.getMoney());

    }
}