animal.java

Java 程序设计源码 只提供了部分

class Animal
{
	int height,weight;
	
	Animal()
	{
		//System.out.println("Animal constructed");
	}
	
	Animal(int height,int weight)
	{
		//System.out.println("Animal constructed");
	}
	
	void eat()
	{
		System.out.println("Animal eat");
	}
	
	void sleep()
	{
		System.out.println("Animal sleep");
	}
	
	void breathe()
	{
		System.out.println("Animal breathe");
	}
}

class Fish extends Animal
{
	int height,weight;
	
	Fish()
	{
		//super();     //隐藏了
		super(30,40);
		//Animal(30,40);	//不能这样调用弗雷父类
		//System.out.println("Fish constructed");	
	}
	
	void breathe()
	{
		//super.breathe();
		//super.height = 40;
		System.out.println("Fish bubble");
	}
}

class Integration
{
	static void fn(Animal an)
	{
		an.breathe();	
	}
	
	public static void main(String [] args)
	{	
		Animal an = new Animal();
		Fish fh = new Fish();
		
		/*an.breathe();
		fh.height = 30;
		fh.breathe();
		*/
		/*an = fh;
		
		Integration.fn(an);*/
		
		/*if(an instanceof Animal)
		{
			System.out.println("an is Animal's instance");
		}
		
		if(fh instanceof Fish)
		{
			System.out.println("fh is Fish's instance");
		}*/
		
		if(an instanceof Fish)
		{
			System.out.println("an is Fish's instance");
		}
		else
		{
			System.out.println("an isn't Fish's instance");
		}
		
		if(fh instanceof Animal)
		{
			System.out.println("fh is Animal's instance");
		}
		else
		{
			System.out.println("fh isn't Animal's instance");
		}
	}
}