工厂方法模板（java编程思想 使用匿名内部类）

package innerclasses;

interface Service{
void method1();
void method2();
}

interface ServiceFactory{
Service getService();
}

class Implementation1 implements Service{
private Implementation1(){}
public void method1(){
System.out.println("Implementation1 method1");
}
public void method2(){
System.out.println("Implementation1 method2");
}
public static ServiceFactory factory =
new ServiceFactory(){
public Service getService(){
return new Implementation1();
}
};
}
class Implementation2 implements Service{
private Implementation2(){
}
public void method1(){
System.out.println("Implementation2 method1");
}
public void method2(){
System.out.println("Implementation2 method2");
}
public static ServiceFactory factory =
new ServiceFactory(){
public Service getService(){
return new Implementation2();
}
};
}
public class Factories {
public static void serviceConsumer(ServiceFactory fact){
Service s = fact.getService();
s.method1();
s.method2();
}
public static void main(String[] args){
serviceConsumer(Implementation1.factory);
serviceConsumer(Implementation2.factory);
}
}