问题 C: 抽象类 I

题目描述

编写抽象类Animal，
包含构造方法
抽象方法
包含成员变量：name, age
 
Main类及Dog类已经编写好。

import java.util.*;
public class Main
{
	public static void main(String[] args)
	{	
		Scanner r = new Scanner(System.in);
		String name;
		int age;
		name = r.next();
		if( !r.hasNextInt() )  
			return;
		age = r.nextInt(); 
		if( age < 0 )  
			return;
		Animal dog=new Dog(name,age);
		dog.eat();
	}
}

class Dog extends Animal
{
	public Dog(String name, int age)
	{
		super(name,age);
	}
	public void eat()
	{
		System.out.println("My name is "+ name);
		System.out.println("I am "+ age +" years old");	
		System.out.println("I like eating bone");
	}
}

输入

宠物名字，年龄

输出

详见样例

样例输入

样例输出

代码

abstract class Animal{
	protected String name;
	protected int age;
	public Animal(String name, int age) {
		this.name = name;
		this.age = age;
	}
	abstract public void eat();
}