工厂设计模式

interface Animal{

 void eat();

 void sleep();

 void move();

}

class Dog implements Animal{

 public void eat(){

  System.out.println("狗吃");

 }

 public void sleep(){

  System.out.println("狗睡");

 }

 public void move(){

  System.out.println("狗动");

 }

 public void lookHouse(){

  System.out.println("狗看门");

 }

}

class Wolf implements Animal{

 public void eat(){

  System.out.println("狼吃");

 }

 public void sleep(){

  System.out.println("狼睡");

 }

 public void move(){

  System.out.println("狼动");

 }

 public void shout(){

  System.out.println("狼嗷嗷叫");

 }

}

/**

  * 工厂类的主要职责：生产对象

*/

class SimpleFactory{

 /**

   * 工厂中的方法都是公共的静态的返回接口类型的方法

 */

 public static Animal getInstance(String type){

  if("dog".equals(type)){

   return new Dog();

  }else if("wolf".equals(type)){

   return new Wolf();

  }else {

   System.out.println("无效的类型");

   return null;

  }

 }

 static void print(Animal al){

  if(al!=null){

   al.eat();

   al.sleep();

   al.move();

   if(al instanceof Dog){

    Dog dog=(Dog)al;

    dog.lookHouse();

   }else if(al instanceof Wolf){

    Wolf wolf=(Wolf)al;

    wolf.shout();

   }

  }

 

 }

 static void exe(){

  Animal dog=SimpleFactory.getInstance("dog");

  Animal wolf=SimpleFactory.getInstance("wolf");

  Animal al=SimpleFactory.getInstance("fox");

  SimpleFactory.print(dog);

  SimpleFactory.print(wolf);

  SimpleFactory.print(al);

 }

}

public class TestSimpleFactoryDemo08{

 public static void main(String[] args){

  /*Animal dog=new Dog();

  dog.eat();

  dog.sleep();

  dog.move();

  Animal wolf=new Wolf();

  wolf.eat();

  wolf.sleep();

  wolf.move();*/

  /*

  Animal dog=new Dog();

  Animal wolf=new Wolf();

  print(dog);

  print(wolf);

  */

 

  SimpleFactory.exe();

 }

}

工厂2

import java.util.*;

interface Animal{

 void sleep();

}

class Dog implements Animal{

 void look(){

  System.out.println("看家");

 }

 public void sleep(){

  System.out.println("狗睡觉");

 }

}

class Cat implements Animal{

 void catchfash(){

  System.out.println("抓鱼");

 }

 public void sleep(){

  System.out.println("猫睡觉");

 }

}

class Factory{

 

 public static Animal fact(String a){

  if(a.equals("cat")){

   return new Cat();

  }else if(a.equals("dog")){

   return new Dog();

  }else{

   return null;

  }

 }

 

}

class Demo103{

public static void main(String[] a){

 Factory fa=new Factory();

 System.out.print("请输入狗或猫:");

 Scanner sc=new Scanner(System.in);

 fa.fact(sc.next()).sleep();

}

}