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抽象类

动物类

public abstract class Animal {
       public void drink()    {
       	System.out.print("动物要喝水\n");    }    public abstract void shout();}

Dog类

public class Dog extends Animal {
   	public void shout(){
   		System.out.print("汪汪汪汪汪汪汪汪汪汪\n");			}	public void dring(){
   		System.out.print("Dog要喝水\n");	}	public static void main(String[] args) {
   		// TODO Auto-generated method stub		Dog dog=new Dog();		dog.drink();		dog.shout();		dog.dring();	}}

Cat类

public class Cat extends Animal{
       	public void shout()	{
   		System.out.print("喵喵喵喵喵喵喵喵喵喵喵喵！\n");	}	public void drink()	{
   		System.out.print("猫要喝水！\n");	}	public static void main(String[] args) {
   		// TODO Auto-generated method stub    Cat cat= new Cat();    cat.drink();    cat.shout();	}}

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