public interface MessageStrategy {　public void sendMessage();　}
public abstract class AbstractStrategyFactory {
　public abstract MessageStrategy createStrategy(MessageBody mb);
}
public class MessageBody {
　Object payload;
　public Object getPayload() {　return payload;　}
　public void configure(Object obj) {　payload = obj;　}
　public void send(MessageStrategy ms) {　ms.sendMessage();　}
}
public class DefaultFactory extends AbstractStrategyFactory {
　private DefaultFactory() {;}
　static DefaultFactory instance = new DefaultFactory();
　public static AbstractStrategyFactory getInstance() {　return instance;　}
　public MessageStrategy createStrategy(final MessageBody mb) {
　　return new MessageStrategy() {
　　　MessageBody body = mb;
　　　public void sendMessage() {　Object obj = body.getPayload();　System.out.println((String)obj);　}
　　};
　}
}
public class HelloWorld {
　public static void main(String[] args) {
　　MessageBody mb = new MessageBody();
　　mb.configure("Hello World!");
　　AbstractStrategyFactory asf = DefaultFactory.getInstance();
　　MessageStrategy strategy = asf.createStrategy(mb);
　　mb.send(strategy);
　}
}