互联网眺望

Man man = new Man.Builder("cbry" , "Smart Brain" , "Nimble Hand")
                .setBook("effective java")
                .setPhone("MEIZU")
                .setComputer("Dell")
                .build();

public class YellowHumanFactory extends HumanFactory{
    @Override
    public Human createHuman() {
        return new YellowHuman();
    }
}

public enum Singleton {  
    INSTANCE;  
    public void whateverMethod() {  
    }  
}