以下是解释我情况的基本框架代码。
这是超级抽象类:
public abstract class Person
{
public void buyFood(String foodName, int payment)
{
System.out.println("Buy " + foodName + " and pay $" + payment + ".");
pay(payment);
}
}
这是超级抽象类的子类:(请注意,我删除了其他函数,例如构造函数和方法,以使帖子简短
public class Visitor extends Person
{
public void pay(int amount)
{
money_v -= amount;
System.out.println(this.to_s() + " has got HK$" + money_v + "left.");
}
}
我想在抽象类中使用这个public void pay(int amount)方法;但是,超级抽象类Person不接受付款(付款),因为该方法不在范围内。如何使这项工作?
感谢〜
答案 0 :(得分:3)
在超类中创建pay作为抽象方法,以便子类覆盖/实现它:
abstract public void pay(int amount);
答案 1 :(得分:1)
@LarsChung:代码附在下面:
public abstract class Person
{
public void buyFood(String foodName, int payment)
{
System.out.println("Buy " + foodName + " and pay $" + payment + ".");
pay(payment);
}
public abstract void pay(int amt);
}
public class Visitor extends Person
{
@Override
public void pay(int amount)
{
money_v -= amount;
System.out.println(this.to_s() + " has got HK$" + money_v + "left.");
}
}