设计模式——模板方法模式

模板方法模式

示例：

public class Test {
    public static void main(String[] args) {
        Game game = new BasketballGame();
        game.play();

        System.out.println("==================================");
        Game game1 = new Football();
        game1.play();
    }
    
}


abstract class Game {

    abstract void initialize();
    abstract void startPlay();
    abstract void endPlay();

    //前提条件
    private void premise() {
        System.out.println("When I have free time");
    }

    public final void play() {
        premise();

        //初始化游戏
        initialize();

        //开始游戏
        startPlay();

        //结束游戏
        endPlay();
    }
}


class BasketballGame  extends Game {
    @Override
    void initialize() {
        System.out.println("Basketball game initialize...");
    }

    @Override
    void startPlay() {
        System.out.println("Basketball Game Started.Enjoy the game!");
    }

    @Override
    void endPlay() {
        System.out.println("Basketball Game Over!");
    }
}

class Football extends Game {
    @Override
    void initialize() {
        System.out.println("Loading...");
        System.out.println("Football Game Initialized! Start playing.");
    }

    @Override
    void startPlay() {
        System.out.println("Football Game Started. Enjoy the game!");
    }

    @Override
    void endPlay() {
        System.out.println("Football Game Finished!");
    }
}