抽象工厂模式（Abstract Factory）

首先看一下UML图：

我们从上往下一个一个实现：

public interface Human 
{
    public void getColor();
    public void talk();
    public void getSex();
}

public abstract class AbstractWhiteHuman implements Human {

    @Override
    public void getColor() {
        System.out.println("白色");
    }

    @Override
    public void talk() {
        System.out.println("我是白人");
    }

}

public abstract class AbstractYelloHuman implements Human {

    @Override
    public void getColor() {
        System.out.println("黄色");
    }

    @Override
    public void talk() {
        System.out.println("我是黄种人");
    }

}

public class FemaleWhiteHuman extends AbstractWhiteHuman {

    @Override
    public void getSex() {
        System.out.println("白人女性");
    }

}

public class FemaleYellowHuman extends AbstractYelloHuman {

    @Override
    public void getSex() {
        System.out.println("黄种人女性");
    }

}

public class MaleWhiteHuman extends AbstractWhiteHuman 
{

    @Override
    public void getSex() {
        System.out.println("白人男性");
    }
    
}

public class MaleYelloHuman extends AbstractYelloHuman {

    @Override
    public void getSex() {
        System.out.println("黄种人男性");
    }

}

public interface HumanFactory 
{
    public Human createWhiteHuman();
    public Human createYellowHuman();
}

public class MaleHumanFactory implements HumanFactory 
{

    @Override
    public Human createWhiteHuman() {
        return new MaleWhiteHuman();
    }

    @Override
    public Human createYellowHuman() {
        return new MaleYelloHuman();
    }
    
}

public class FemaleHumanFactory implements HumanFactory {

    @Override
    public Human createWhiteHuman() {
        return new FemaleWhiteHuman();
    }

    @Override
    public Human createYellowHuman() {
        return new FemaleYellowHuman();
    }

}