animal.java

第四次作业 1、 创建一个Animal（动物）类

/**
 * class animal is the base class
 * method print() is overrided in derived class
 *
 */
public class Animal {
	public void print(){
		System.out.println("method print() in Animal Class");
	}
	
	
	public static void  main(String[] args){
		
		Animal animals[] = {new Cat(),new Dog(), new Horse()};
		for(Animal t: animals){
			t.print();
		}	//polymorphism,according to the parameter ,to choose which method to excute
		
		
		
	}
}