面试题复习-常用设计模式-工厂模式

Posted 2022-05-27 caizhiqin

手写一个工厂模式

产品接口：

package com.ajax.pattern.factorymethod;

public interface Fruit 
    void desc();

产品1：

package com.ajax.pattern.factorymethod;

public class Apple implements Fruit 
    @Override
    public void desc() 
        System.out.println("苹果");
    

产品2：

package com.ajax.pattern.factorymethod;

public class Orange implements Fruit 
    @Override
    public void desc() 
        System.out.println("橙子");
    

工厂接口：

package com.ajax.pattern.factorymethod;

public interface FruitFactory 
    Fruit getFruit();

产品1工厂：

package com.ajax.pattern.factorymethod;

public class AppleFactory implements FruitFactory 
    @Override
    public Fruit getFruit() 
        return new Apple();
    

产品2工厂：

package com.ajax.pattern.factorymethod;

public class OrangeFactory implements FruitFactory 
    @Override
    public Fruit getFruit() 
        return new Orange();
    

运行：

package com.ajax.pattern.factorymethod;

public class Run 
    public static void main(String[] args) 
        Fruit fruit1 = new AppleFactory().getFruit();
        fruit1.desc();
        Fruit fruit2 = new OrangeFactory().getFruit();
        fruit2.desc();