JAVA 用polymorphism一道題目的問題

一问题是这样的:
先建立一个Animal的 class 是 abstract
Animal有 move() 这个方法
接着有狗、人、鸟三个class 分别的移动是 "四只脚 "&"两只脚" & "翅膀"
都继承自Animal
继承Animal的类别,必须改写其move方法
并显示出每种动物的移动方式

说明:
Animal不存在的,他不会真的"move",也不能被实例化
在建立出各种动物的Subcategory(子类别) 物件时,将这些物件放入同一个阵列中
利用回圈方式,印出所有动的讯息

我只写的出部分功能但无法把它完整执行
谢谢论坛的朋友们

abstract class Animal{
          public void move(){
              System.out.println();
        }
}



 pulbic  class Dog extends Animal{
    public void move(){
            System.out.println("四只脚");
    }
}


public class Bird extends Animal {
    public void move(){
        System.out.println(" 翅膀 ");
    }
}

public class Human extends Animal {
    public void move(){
        System.out.println("两只脚");
    }
}

public class Main{
    public static void main(String[] args){
      Animal[] animals = new Animal[3];
      animals[0] = new Bird();
      animals[1] = new Human();
      animals[2] = new dog();
      
      for(int i=0;i<animals.length;i++){
          animals[i].make.Sound();
          }
      }
}

# Java

高洛峰2259 天前464 次浏览

public abstract class Animal { public void move() { System.out.println(); } } public class Bird extends Animal { public void move() { System.out.println( " 翅膀 " ); } } public class Dog extends Animal { public void move() { System.out.println( "四只脚" ); } } public class Human extends Animal { public void move() { System.out.println( "两只脚" ); } } public class Main { public static void main(String[] args) { Animal[] animals = new Animal[3]; animals[0] = new Bird(); animals[1] = new Dog(); animals[2] = new Human(); for (Animal animal : animals) animal.move(); } }

abstract class Animal{ public abstract void move(); } class Dog extends Animal{ public void move(){ System.out.println("四只脚"); } } class Bird extends Animal { public void move(){ System.out.println(" 翅膀 "); } } class Human extends Animal { public void move(){ System.out.println("两只脚"); } } public class Main{ public static void main(String[] args){ Animal[] animals = new Animal[3]; animals[0] = new Bird(); animals[1] = new Human(); animals[2] = new Dog(); for(int i=0;i<animals.length;i++){ animals[i].move(); } } }

JAVA 用polymorphism一道題目的問題

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