BlackFactory


package sc4;

public class BlackFactory implements MWFactory
{
    public static Man produceMan()
    {
        return new BlackSkinMan();
    }

    public static Woman produceWomen()
    {
        return new BlackSkinWomen();
    }
}
BlackSkinMan


package sc4;


    public class BlackSkinMan implements Man
    {
        public void play()
        {
            System.out.println("我是黑种男人!");
        }
    }
BlackSkinWomen


package sc4;

public class BlackSkinWomen implements Woman
{
    public void play()
    {
        System.out.println("我是黑种女人!");
    }
}

client


package sc4;
import java.util.Scanner;
public class Client
{
    public static void main(String args[]) {

        Man m;
        Woman w;
        Scanner x = new Scanner(System.in);
        int n = 0;

            System.out.println("请选择肤色 1.黑色，2、白色，3、黄色");

        if (x.hasNextInt()) {
            n = x.nextInt();
        } else {
            System.out.println("输入的不是整数，请重新输入：");

        }
        switch (n) {
            case 1: {
                m = BlackFactory.produceMan();
                m.play();
                w = BlackFactory.produceWomen();
                w.play();
                break;
            }
            case 2: {
                m = WhiteFactory.produceMan();
                m.play();
                w = WhiteFactory.produceWomen();
                w.play();
                break;
            }
            case 3: {
                m = YellowFactory.produceMan();
                m.play();
                w = YellowFactory.produceWomen();
                w.play();
                break;
            }

        }
    }
}
 Man


package sc4;


    public interface Man
    {
        public void play();
    }
 MWFactory


package sc4;

public interface MWFactory
{
    public static Man produceMan() {
        return null;
    }

    public static Woman produceWomen() {
        return null;
    }
}
WhiteFactory


package sc4;

public class WhiteFactory implements MWFactory
{
    public static Man produceMan()
    {
        return new WhiteSkinMan();
    }

    public static Woman produceWomen()
    {
        return new WhiteSkinWomen();
    }
}
WhiteSkinMan


package sc4;

public class WhiteSkinMan implements Man{
    public void play()
    {
        System.out.println("我是白种男人!");
    }
}
WhiteSkinWomen


package sc4;

public class WhiteSkinWomen implements Woman{
    public void play()
    {
        System.out.println("我是白种女人!");
    }
}
 Woman


package sc4;

public interface Woman
{
    public void play();
}

 YellowFactory


package sc4;

public class YellowFactory {

    public static Man produceMan()
    {
        return new YellowSkinMan();
    }

    public static Woman produceWomen()
    {
        return new YellowSkinWomen();
    }
}
yellowSkinMan


package sc4;

public class YellowSkinMan implements Man{
    public void play()
    {
        System.out.println("我是黄种男人!");
    }
}

 yellowSkinWomen

package sc4;

public class YellowSkinWomen implements Woman{
    public void play()
    {
        System.out.println("我是黄种女人!");
    }
}