Java超类和子类

Question

I have my superclass called "BossCraft" which includes a void method labeled "move". I also have a class that extends BossCraft called SharkBoss, which also has a void "move" method.

Is it possible to somehow call the SharkBoss's "move" method into the higher BossCraft method?

public class BossCraft
{
   public void move
   {
      //SharkBoss's move should go here
   }
}
public class SharkBoss extends BossCraft
{
   public void move
   {
      ...
   }
}

Answer 1

Yes, super.move() ( super. means calling (a method of) the superclass)

If you want to do the reverse - call the subclass from superclass - it's not possible. The superclass does not know (and should not know) of the existence if its subclasses.

Note that your definitions are syntactically incorrect - you should have brackets - move()

Answer 2

use

super.move();

It will call the move() function of its parent (ie its superclass-instance)!

Answer 3

我想调用父级方法，用户超级关键字如果要调用子级方法，我将看一下Abstract类

Answer 4

Yes:

BossCraft craft = new SharkBoss();
// Actually calls SharkBoss.nove
craft.move();

Answer 5

You should not be doing this. The whole point of inheritance is that SharkBoss is always a BossCraft, but a BossCraft may or may not be a SharkBoss. Methods on the SharkBoss craft should only be applicable to a SharkBoss.

If you call 'move' on a SharkBoss then the SharkBoss move will be called without you having to do anything.

Answer 6

You could simply cast to SharkBoss in the move method of the superclass :

public class BossCraft {
   public void move(){
       //SharkBoss's move should go here
   SharkBoss s = (SharkBoss) this;
   s.move();
   }
}

However the very principle of using subclasses is that it should be a one-way relationship, superclasses shouldn't know about their subclasses. I would advise you to refactor.