import java.util.Random;
import static org.greggordon.tools.Print.*;

/**
 * Create by liuw on 2022/3/27 9:54
 * 接口与工厂之
 * 使用工厂方法创建一个框架，可以执行抛硬币和掷色子功能
 */
interface Games {
    void play();
}

interface GamesFactory {
    Games getGames();
}

class CoinToss implements Games {
    Random rand = new Random();
    public void play() {
        print("Toss Coin: ");
        switch(rand.nextInt(2)) {
            case 0 : println("Heads"); return;
            case 1 : println("Tails"); return;
            default: println("OnEdge"); return;
        }
    }
}

class CoinTossFactory implements GamesFactory {
    public Games getGames() {
        return new CoinToss();
    }
}

class DiceThrow implements Games {
    Random rand = new Random();
    public void play() {
        print("Throw Dice: " + (rand.nextInt(6) + 1));
    }
}

class DiceThrowFactory implements GamesFactory {
    public Games getGames() {
        return new DiceThrow();
    }
}


public class Ex19 {
    public static void playGame(GamesFactory factory) {
        Games g = factory.getGames();
        g.play();
    }
    public static void main(String [] args) {
        playGame(new CoinTossFactory());
        playGame(new DiceThrowFactory());
    }
}

出处是thinking in java 第九章习题19