Question

java 抽象类与抽象方法

建立鱼的抽象类，鱼类Fish，可以分为淡水鱼(Freshwater_fish )和热带鱼(Tropical_fish)，这里以淡水鱼为例，淡水鱼包含鲤鱼Carp、鲈鱼Weever、鲶鱼Catfish等，每种都可以游动（ void swimming() ）。

Answer 1

不知道合不合适

package com.kidd.baiduzhidao;

public class Test {

    public static void main(String[] args) {

        Fish fish = new Freshwater_fish();
        fish.swimming();

        fish = new Tropical_fish();
        fish.swimming();

        fish = new Carp();
        fish.swimming();

    }
}

class Fish implements Swimable {

    @Override
    public void swimming() {
        System.out.println("I'm Fish,I can Swimming.");
    }

}

class Freshwater_fish extends Fish {
    @Override
    public void swimming() {
        System.out.println("I'm Freshwater_fish,I can Swimming.");
    }
}

class Tropical_fish extends Fish {
    @Override
    public void swimming() {
        System.out.println("I'm Tropical_fish,I can Tropical_fish.");
    }
}

class Carp extends Freshwater_fish {
    @Override
    public void swimming() {
        System.out.println("I'm Carp,I'm a Freshwater_fish,I can Swimming.");
    }
}

class Weever extends Freshwater_fish {
    @Override
    public void swimming() {
        System.out.println("I'm Weever,I'm a Freshwater_fish,I can Swimming.");
    }
}

class Catfish extends Freshwater_fish {
    @Override
    public void swimming() {
        System.out.println("I'm Catfish,I'm a Freshwater_fish,I can Swimming.");
    }
}

 

package com.kidd.baiduzhidao;

public interface Swimable {

    public void swimming();

}