动态绑定（多态）

来源：互联网发布：网络渗透软件编辑：程序博客网时间：2024/05/01 06:07

class Animal{
  private String name;
  public Animal(String name){
  this.name=name;
}
  public void enjoy(){
System.out.println("动物的叫声。。。。。。。。。。");
}
}
class Cat extends Animal{
String color;
  public Cat(String name,String color){
  super(name);
  this.color=color;
}
  public void enjoy(){
System.out.println("猫叫声。。。。。。。。。。。");
}
}
class Dog extends Animal{
String color;
  public Dog(String name,String color){
super(name);
  this.color=color;
}
  public void enjoy(){
System.out.println("狗叫声。。。。。。。。。。。。。");
}
}
/*class Bird extends Animal{
String color;
public Bird(String name,String color){
super(name);
this.color=color;
}
public void enjoy(){
System.out.println("鸟叫声。。。。。。。。。。。。。");
}
}
*/
class Lady{
  private String name;
  private Animal pet;
  public Lady(String name,Animal pet){
  this.name=name;
  this.pet=pet;
}
  public void myPetEnjoy(){
pet.enjoy();
}
}
public class A {
  public static void main (String [] args)
{
Cat cat=new Cat("mimi","yellow");
Dog dog=new Dog("huahua","black");
  //Bird bird=new Bird("yingwu","red");
Lady l1=new Lady("lily",cat);
Lady l2=new Lady("jack",dog);
// Lady l3=new Lady("john",bird);
l1.myPetEnjoy();
l2.myPetEnjoy();
  //l3.myPetEnjoy();
}

}

//00000000000以下这种效果不是最好的00000000000000000000000000

class Animal{

public String name;

public Animal(String name){

this.name=name;

}

class Cat extends Animal{

public String color;

public Cat(String name,String color){

super(name);

this.color=color;

}

class Dog extends Animal{

public String color;

public Dog(String name,String color){

super(name);

this.color=color;

}

public class A {

public static void main (String [] args)

{

A a=new A();

Animal animal=new Animal("animal");

Cat cat=new Cat("mimi","yellow");

Dog dog=new Dog("huahua","black");

a.f(animal);

a.f(cat);

a.f(dog);

}

public void f(Animal a){

System.out.println("name :"+ a.name);

if(a instanceof Cat){

Cat c=(Cat)a;

System.out.println(" "+c.name+" "+c.color);

}

else if(a instanceof Dog){

Dog d=(Dog)a;

System.out.println(" "+d.name+" "+d.color);

}

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