工厂方法模式

Factories.java

import static com.mceiba.util.Print.*;
import java.util.*;

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