设计模式单例模式和工厂模式综合应用

package pk01; //单例模式保证只创建一个对象 public class AppleFactory implements Factory { private static AppleFactory instance = null; //私有化构造方法 private AppleFactory() { } //提供一个全局访问点，加锁保证线程安全 public static synchronized AppleFactory getInstance() { if(instance==null) { synchronized (AppleFactory.class) { if(instance==null) { instance= new AppleFactory(); } } } return instance; } public Mobile ProduceMobile() { // TODO Auto-generated method stub System.out.println("该工厂生产的苹果手机"); return new Apple(); } }