Java学习之给定如图所示的Animal类及其子类的继承关系UML图。编写代码实现这些类。

Java学习之给定如图所示的Animal类及其子类的继承关系UML图。编写代码实现这些类。

一、案例介绍： 给定如图所示的Animal类及其子类的继承关系UML图。编写代码实现这些类。

二、案例代码：

public class AnimalTest { public static void main(String[] args) { Animal animal = new Animal(); animal.eat(); Bird bird = new Bird(); bird.fly(); Fish fish = new Fish(); fish.swim(); Dog dog = new Dog(); dog.walk(); } } class Animal{ private double weight; public void eat() { System.out. println("I can eat anything."); } } class Bird extends Animal{ public int numberOfwings; public void fly(){ System.out. println( "I can fly."); } } class Fish extends Animal{ public int numberOfFins; public void swim(){ System.out. println( "I can swim."); } } class Dog extends Animal{ public int numberOfLegs; public void walk(){ System. out. println( "I can walk."); } }

三、案例运行图：