满意答案

bjtm0210

推荐于 2017.12.16

采纳率：57%    等级：8

已帮助：611人

我写了一个，内容比较简单的。代码如下：public class AnimalTest {

Animal animal;

public void eat(Animal animal){

animal.eat();

}

public void walk(Animal animal){

animal.walk();

}

public static void main(String args[]){

Animal animal=new Animal("animal");

Wolf w=new Wolf("wolf");

Goat g=new Goat("goat");

AnimalTest at=new AnimalTest();

at.eat(animal);

at.eat(w);

at.eat(g);

at.walk(animal);

at.walk(w);

at.walk(g);

}

}

class Animal {

String name;

public Animal(String name){

this.name=name;

}

public Animal(){}

public void setName(String name){

this.name=name;

}

public String getName(){

return name;

}

public void eat(){

System.out.println("animal eat");

}

public void walk(){

System.out.println("animal walk");

}

public String toString(){

return name;

}

}class Wolf extends Animal {

public Wolf(String name){

super(name);

}

public Wolf(){}

public void eat(){

System.out.println("wolf eat meat");

}

public void walk(){

System.out.println("wolf walk");

}

public String toString(){

return name;

}

}class Goat extends Animal {

public Goat(String name){

super(name);

}

public Goat(){}

public void eat(){

System.out.println("goat eat grass");

}

public void walk(){

System.out.println("goat walk");

}

public String toString(){

return name;

}

}

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